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Raffa RB, Taylor R, Pergolizzi JV. Treating opioid‐induced constipation in patients taking other medications: Avoiding CYP450 drug interactions. J Clin Pharm Ther 2019; 44:361-371. [DOI: 10.1111/jcpt.12812] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/15/2019] [Accepted: 01/18/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Robert B. Raffa
- University of Arizona College of Pharmacy Tucson Arizona
- Temple University School of Pharmacy Philadelphia Pennsylvania
- Neumentum Inc Palo Alto California
- The NEMA Research Group Naples Florida
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Opioid-induced bowel dysfunction: suggestions from a multidisciplinary expert Board. Support Care Cancer 2019; 27:4083-4090. [PMID: 30778756 PMCID: PMC6803581 DOI: 10.1007/s00520-019-04688-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 02/05/2019] [Indexed: 02/07/2023]
Abstract
Constipation, one of the adverse effects of opioid therapy with a major impact on quality of life, is still an unmet need for cancer patients, particularly those with an advanced and progressive disease, and for non-cancer patients chronically treated with opioids. The awareness of this condition is poor among healthcare providers, despite the recent publication of guidelines and consensus conferences. An early multidisciplinary approach of opioid-induced bowel dysfunction (OIBD), based on available therapies of proven effectiveness, could support clinicians in managing this condition, thus increasing patients’ adherence to pain therapy. Several Italian experts involved in the management of patients suffering from pain (anaesthesia pain therapy, oncology, haematology, palliative care, gastroenterology) joined in a Board in order to draw up an expert opinion on OIBD. The most frequent and still unsolved issues in this field were examined, including a more comprehensive definition of OIBD, the benefits of early intervention to prevent its occurrence and the most appropriate use of peripherally acting mu-opioid receptor antagonists (PAMORAs). The use of the recently introduced PAMORA naloxegol was analysed, in light of the current literature. The Board proposed a solution for each open issue in the form of recommendations, integrated with the contribution of representatives from different disciplines and often accompanied by procedural algorithms immediately usable and applicable in daily clinical practice. Safety and quality of life of the patient suffering from pain and from the adverse effects of pain therapies have been the mainstays of this expert opinion, in cooperation with general practitioners and caregivers.
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Kuhlmann L, Olesen SS, Olesen AE, Arendt-Nielsen L, Drewes AM. Mechanism-based pain management in chronic pancreatitis - is it time for a paradigm shift? Expert Rev Clin Pharmacol 2019; 12:249-258. [PMID: 30664364 DOI: 10.1080/17512433.2019.1571409] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Pain is the most common symptom in chronic pancreatitis and treatment remains a challenge. Management of visceral pain, in general, is only sparsely documented, and treatment in the clinic is typically based on empirical knowledge from somatic pain conditions. This may be problematic, as many aspects of the neurobiology differ significantly from somatic pain, and organs such as the gut and liver play a major role in tolerability to analgesics. On the other hand, clinical awareness and new methods for quantitative assessment of pain mechanisms, will likely increase our understanding of the visceral pain system and guide more individualized pain management. Areas covered: This review includes an overview of known pain mechanisms in chronic pancreatitis and how to characterize them using quantitative sensory testing. The aim is to provide a mechanism-oriented approach to analgesic treatment, including treatment of psychological factors affecting pain perception and consideration of side effects in the management plan. Expert opinion: A mechanism-based examination and profiling of pain in chronic pancreatitis will enable investigators to provide a well-substantiated approach to effective management. This mechanism-based, individualized regime will pave the road to better pain relief and spare the patient from unnecessary trial-and-error approaches and unwanted side effects.
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Affiliation(s)
- Louise Kuhlmann
- a Centre for Pancreatic Diseases and Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark.,b Department of Internal Medicine , North Denmark Regional Hospital , Hjørring , Denmark.,c Department of Clinical Medicine , Aalborg University , Aalborg , Denmark
| | - Søren S Olesen
- a Centre for Pancreatic Diseases and Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark.,c Department of Clinical Medicine , Aalborg University , Aalborg , Denmark
| | - Anne E Olesen
- a Centre for Pancreatic Diseases and Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark.,c Department of Clinical Medicine , Aalborg University , Aalborg , Denmark
| | - Lars Arendt-Nielsen
- d Center for Sensory-Motor Interaction, School of Medicine , Aalborg University , Aalborg , Denmark
| | - Asbjørn M Drewes
- a Centre for Pancreatic Diseases and Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark.,c Department of Clinical Medicine , Aalborg University , Aalborg , Denmark
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Swezey T, Reeve B, Hart T, Floor M, Dollar C, Gillies A, Tosi L. Incorporating the patient perspective in the study of rare bone disease: insights from the osteogenesis imperfecta community. Osteoporos Int 2019; 30:507-511. [PMID: 30191258 PMCID: PMC6449303 DOI: 10.1007/s00198-018-4690-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 08/26/2018] [Indexed: 11/26/2022]
Abstract
UNLABELLED There is limited research which examines health concerns of individuals with osteogenesis imperfecta (OI). Discussion groups with leaders of the adult OI community identified a broad range of medical priorities beyond fractures and brittle bones. Our work underscores the need to include patient-reported outcomes in rare bone disease research. INTRODUCTION Osteogenesis imperfecta (OI) is a rare genetic disorder affecting collagen protein leading to brittle bones and a number of other medical complications. To date, there is limited research which examines the life-long process of aging with this rare disease, much less the perspective of individuals with OI. METHODS In order to explore and prioritize health concerns that adults with OI feel have been inadequately addressed in health care and research, investigators held discussions with leaders from the global adult OI community. The meetings were held in August 2017 at the 13th International Conference on OI in Oslo, Norway as part of the preconference seminar "Patient Participation in OI Research". Investigators were part of the Brittle Bone Disease Consortium (BBDC), a multicenter research program devoted to the study of OI, and their focus was on patient-reported outcomes (PRO). RESULTS Participants noted that while fractures and brittle bones are the most common feature of OI, a number of body systems are under-studied in this disorder. They particularly emphasized breathing, hearing, and the effects of aging as primary concerns that researchers and physicians may not fully understand or address. Other areas included pain, gastrointestinal problems, mental health, nutrition, menopause/pregnancy, and basilar invagination. Participants also emphasized that they must be informed of study results. They underscored that outcome measures incorporated into future drug trials must look beyond fractures and consider the whole patient. CONCLUSIONS This work will help guide the incorporation of PROs into the next phase of the BBDC Natural History Study of OI and underscores the importance of including PROs in the study of rare diseases.
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Affiliation(s)
- T. Swezey
- Department of Population Health Sciences, Duke University School of Medicine, Durham, NC USA
| | - B.B. Reeve
- Department of Population Health Sciences, Duke University School of Medicine, Durham, NC USA
| | - T.S. Hart
- The Osteogenesis Imperfecta Foundation, Gaithersburg, MD USA
| | - M.K. Floor
- Division of Orthopaedic Surgery and Sports Medicine, Children’s National Health System, Washington, DC USA
| | - C.M. Dollar
- Division of Orthopaedic Surgery and Sports Medicine, Children’s National Health System, Washington, DC USA
| | - A.P. Gillies
- Division of Orthopaedic Surgery and Sports Medicine, Children’s National Health System, Washington, DC USA
| | - L.L. Tosi
- Division of Orthopaedic Surgery and Sports Medicine, Children’s National Health System, Washington, DC USA
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Farmer AD, Drewes AM, Chiarioni G, De Giorgio R, O'Brien T, Morlion B, Tack J. Pathophysiology and management of opioid-induced constipation: European expert consensus statement. United European Gastroenterol J 2019; 7:7-20. [PMID: 30788113 PMCID: PMC6374852 DOI: 10.1177/2050640618818305] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 09/18/2018] [Indexed: 12/31/2022] Open
Abstract
Background Opioid-induced bowel dysfunction is a complication of opioid therapy, in which constipation is the most common and problematic symptom. However, it is frequently under-recognised and thus effective management is often not instituted despite a number of treatment options. Objective The central objective of this study is to provide a summary of the pathophysiology and clinical evaluation of opioid-induced constipation and to provide a pragmatic management algorithm for day-to-day clinical practice. Methods This summary and the treatment algorithm is based on the opinion of a European expert panel evaluating current evidence in the literature. Results The pathophysiology of opioid-induced constipation is multi-faceted. The key aspect of managing opioid-induced constipation is early recognition. Specific management includes increasing fluid intake, exercise and standard laxatives as well as addressing exacerbating factors. The Bowel Function Index is a useful way of objectively evaluating severity of opioid-induced constipation and monitoring response. Second-line treatments can be considered in those with recalcitrant symptoms, which include gut-restricted or peripherally acting mu-opioid receptor antagonists. However, a combination of interventions may be needed. Conclusion Opioid-induced constipation is a common, yet under-recognised and undertreated, complication of opioid therapy. We provide a pragmatic step-wise approach to opioid-induced constipation, which should simplify management for clinicians.
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Affiliation(s)
- Adam D Farmer
- Institute of Applied Clinical Science, Keele University, Keele, UK
- Department of Gastroenterology, Aalborg University Hospital, Aalborg, Denmark
- Centre for Trauma and Neuroscience, Queen Mary University of London, London, UK
| | - Asbjørn M Drewes
- Department of Gastroenterology, Aalborg University Hospital, Aalborg, Denmark
| | - Giuseppe Chiarioni
- Division of Gastroenterology, Azienda Ospedaliera Universitaria Integrata, Verona, Italy
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, USA
| | | | - Tony O'Brien
- Marymount University Hospital and Hospice, Curraheen, Ireland
- Cork University Hospital, Wilton, Ireland
| | - Bart Morlion
- Leuven Centre for Algology and Pain Management, University of Leuven, Leuven, Belgium
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
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Leppert W, Zajaczkowska R, Wordliczek J. The role of oxycodone/naloxone in the management of patients with pain and opioid-induced constipation. Expert Opin Pharmacother 2019; 20:511-522. [PMID: 30625013 DOI: 10.1080/14656566.2018.1561863] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Common opioid adverse effects (AE) of the gastrointestinal tract include opioid-induced constipation (OIC) and opioid-induced bowel dysfunction (OIBD) with traditional laxatives being of limited efficacy, having AEs and not addressing the pathophysiology of OIC or OIBD. Targeted treatment comprises of PAMORA (peripherally acting mu-opioid receptor antagonists) and a combination of an opioid receptor agonist with its antagonist, namely prolonged-release oxycodone with prolonged-release naloxone (OXN) tablets at a fixed ratio of 2:1. Oxycodone provides analgesia, whereas naloxone prevents binding or displaces it from opioid receptors located in the gut wall. Areas covered: The authors review the role of OXN in the management of patients with pain and OIC. A literature search was performed using the search terms 'oxycodone/naloxone' and 'opioid-induced constipation' using the PubMed database up to October 2018. Expert opinion: OXN delivers analgesia comparable (or superior versus placebo and in observational studies) to oxycodone alone and other opioids with a limited or decreased disturbing effect on bowel function. OXN in daily doses of up to 160 mg/80 mg provides effective analgesia with little negative impact on bowel function. OXN may be successfully used in patients with chronic pain, to prevent or treat symptoms of OIC and OIBD.
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Affiliation(s)
- Wojciech Leppert
- a Laboratory of Quality of Life Research, Chair and Department of Palliative Medicine , Poznan University of Medical Sciences , Poznan , Poland
| | - Renata Zajaczkowska
- b Department of Interdisciplinary Intensive Care , Jagiellonian University Medical College , Krakow , Poland.,c Department of Anesthesiology and Intensive Therapy , University Hospital , Krakow , Poland
| | - Jerzy Wordliczek
- b Department of Interdisciplinary Intensive Care , Jagiellonian University Medical College , Krakow , Poland.,c Department of Anesthesiology and Intensive Therapy , University Hospital , Krakow , Poland
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Mark EB, Bødker MB, Grønlund D, Østergaard LR, Frøkjaer JB, Drewes AM. MRI analysis of fecal volume and dryness: Validation study using an experimental oxycodone-induced constipation model. J Magn Reson Imaging 2019; 50:733-745. [PMID: 30609164 DOI: 10.1002/jmri.26628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/12/2018] [Accepted: 12/12/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Opioids are known to affect gastrointestinal motility, but their effect on fluid absorption and secretion is poorly understood in humans. PURPOSE To investigate the effect of oxycodone on colonic fecal volume and stool dryness by using a novel MRI-based technique. STUDY TYPE Prospective, randomized, double-blinded, crossover study. SUBJECTS Twenty-five healthy male volunteers (median age: 24 years [range: 21-56]; mean body mass index [BMI]: 23.9 kg/m2 [range: 22.9-25.0]) without known gastrointestinal disease. FIELD STRENGTH/SEQUENCE T2 -weighted and two-point Dixon MRI scans of the abdomen at 1.5 T. ASSESSMENT Subjects were treated for 5 days with prolonged-release oxycodone or a placebo. Imaging was performed on the first and last study day in each period. Images of the colon were analyzed with semiautomatic k-means-based segmentation software. Regional colonic fecal volumes were quantified excluding gas volume and colon wall. Two-point Dixon and T2 -weighted MRI signal intensity were assessed as a proxy of colonic stool dryness. Data were obtained in a previously reported study. STATISTICAL TESTS Intraclass correlation coefficients were used to test the reliability of measurements between days, while repeated measures mixed models were applied to test treatment effects. RESULTS After oxycodone treatment, total colonic fecal volume was significantly increased compared with placebo (mean change 100 mL vs. -13 mL; P = 0.001), with the largest increase (24%) observed in the ascending colon/cecum (P = 0.001). Dixon signal increased (less water in colon content) after oxycodone treatment compared with placebo (mean 0.09 vs. -0.02; P < 0.001). T2 -weighted signal decreased (less water in colon content) after oxycodone treatment compared with placebo (mean -0.03 vs. 0.03; P = 0.002). DATA CONCLUSION The 5-day oxycodone treatment increased colonic fecal volume and increased stool dryness compared with placebo. This imaging-based method for noninvasive analysis of colon content has the potential to characterize gastrointestinal symptoms in general, such as in constipation. LEVEL OF EVIDENCE 2 Technical Efficacy Stage: 1 J. Magn. Reson. Imaging 2019;50:733-745.
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Affiliation(s)
- Esben B Mark
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Mech-Sense, Department of Radiology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Mark B Bødker
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Debbie Grønlund
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Lasse R Østergaard
- Department of Health Science and Technology, Aalborg University, Aalborg Øst, Denmark
| | - Jens B Frøkjaer
- Mech-Sense, Department of Radiology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Asbjørn M Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Mech-Sense, Department of Radiology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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Reed R, Barletta M, Mitchell K, Hanafi A, Bullington A, Knych H, Quandt J, Ryan C, Giguère S. The pharmacokinetics and pharmacodynamics of intravenous hydromorphone in horses. Vet Anaesth Analg 2018; 46:395-404. [PMID: 30930095 DOI: 10.1016/j.vaa.2018.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/19/2018] [Accepted: 11/01/2018] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Describe the pharmacokinetics and pharmacodynamics of intravenous hydromorphone in healthy horses. STUDY DESIGN Masked, randomized, cross-over, Latin square design. ANIMALS A group of eight healthy adult horses METHODS: Horses were administered each of four treatments with an 8 day washout. Treatments groups included intravenous hydromorphone 0.02 mg kg-1 (LD), 0.04 mg kg-1 (MD), 0.08 mg kg-1 (HD) and saline (P). Blood samples for hydromorphone analysis were obtained for 24 hours after treatment. Plasma hydromorphone was quantified and pharmacokinetic parameters were determined using non-compartmental analysis. Pharmacodynamic data collected for 24 hours after treatment included thermal nociceptive threshold, heart rate (HR), respiratory rate (fR) and rectal temperature, and analyzed using mixed-effects linear models. RESULTS Mean (± standard deviation) hydromorphone terminal half-life (t1/2), systemic clearance and apparent volume of distribution at steady state (Vdss) were 18.1 ± 18.6, 34.0 ± 12.8, and 41.3 ± 32.5 minutes, 66.6 ± 5.3, 550.0 ± 76.4, and 92.7 ± 13.9 mL kg-1 minute-1, and 1118 ± 369, 1460 ± 325 and 2242 ± 950 mL kg-1 for treatments LD, MD and HD, respectively. Thermal threshold increased significantly compared to baseline for all treatments for up to 12 hours. HR was elevated above baseline in treatments LD, MD and HD, extending to 30, 15 and 105 minutes after treatment, respectively. Respiratory rate was elevated above baseline in treatments MD and HD from 30 to 195 minutes and from 45 to 480 minutes after treatment, respectively. Temperature was elevated above baseline in treatment HD until 255 minutes after treatment. CONCLUSIONS Hydromorphone exhibited a short t1/2, rapid clearance and large Vdss in horses. It also provided a dose-dependent increase in thermal threshold with associated increases in HR, fR and rectal temperature. CLINICAL RELEVANCE Hydromorphone 0.04 mg kg-1 provided clinically relevant thermal antinociception with minimal adverse effects.
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Affiliation(s)
- Rachel Reed
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA.
| | - Michele Barletta
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - Krista Mitchell
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - Amanda Hanafi
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - Annie Bullington
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - Heather Knych
- Department of Molecular Biosciences, University of California Davis School of Veterinary Medicine, Davis, CA, USA
| | - Jane Quandt
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - Clare Ryan
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - Steeve Giguère
- Department of Large Animal Medicine, University of Georgia College of Veterinary Medicine, Athens, GA, USA
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Grønlund D, Vase L, Knudsen SA, Christensen M, Drewes AM, Olesen AE. Comparison of subjective and objective measures of constipation – Employing a new method for categorizing gastrointestinal symptoms. J Pharmacol Toxicol Methods 2018; 94:23-28. [DOI: 10.1016/j.vascn.2018.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/10/2018] [Accepted: 08/15/2018] [Indexed: 02/07/2023]
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Implementation of a Risk-Stratified Opioid and Benzodiazepine Weaning Protocol in a Pediatric Cardiac ICU. Pediatr Crit Care Med 2018; 19:1024-1032. [PMID: 30234674 DOI: 10.1097/pcc.0000000000001719] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Opioids and benzodiazepines are commonly used to provide analgesia and sedation for critically ill children with cardiac disease. These medications have been associated with adverse effects including delirium, dependence, withdrawal, bowel dysfunction, and potential neurodevelopmental abnormalities. Our objective was to implement a risk-stratified opioid and benzodiazepine weaning protocol to reduce the exposure to opioids and benzodiazepines in pediatric patients with cardiac disease. DESIGN A prospective pre- and postinterventional study. PATIENTS Critically ill patients less than or equal to 21 years old with acquired or congenital cardiac disease exposed to greater than or equal to 7 days of scheduled opioids ± scheduled benzodiazepines between January 2013 and February 2015. SETTING A 24-bed pediatric cardiac ICU and 21-bed cardiovascular acute ward of an urban stand-alone children's hospital. INTERVENTION We implemented an evidence-based opioid and benzodiazepine weaning protocol using educational and quality improvement methodology. MEASUREMENTS AND MAIN RESULTS One-hundred nineteen critically ill children met the inclusion criteria (64 post intervention, 55 pre intervention). Demographics and risk factors did not differ between groups. Patients in the postintervention period had shorter duration of opioids (19.0 vs 30.0 d; p < 0.01) and duration of benzodiazepines (5.3 vs 22.7 d; p < 0.01). Despite the shorter duration of wean, there was a decrease in withdrawal occurrence (% Withdrawal Assessment Tool score ≥ 4, 4.9% vs 14.1%; p < 0.01). There was an 8-day reduction in hospital length of stay (34 vs 42 d; p < 0.01). There was a decrease in clonidine use (14% vs 32%; p = 0.02) and no change in dexmedetomidine exposure (59% vs 75%; p = 0.08) in the postintervention period. CONCLUSIONS We implemented a risk-stratified opioid and benzodiazepine weaning protocol for critically ill cardiac children that resulted in reduction in opioid and benzodiazepine duration and dose exposure, a decrease in symptoms of withdrawal, and a reduction in hospital length of stay.
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Song F, Ye C, Qi F, Zhang P, Wang X, Lü Y, Fernandez-Escobar A, Zheng C, Li L. Effect of perioperative infusion of Dexmedetomidine combined with Sufentanil on quality of postoperative analgesia in patients undergoing laparoscopic nephrectomy: a CONSORT-prospective, randomized, controlled trial. BMC Anesthesiol 2018; 18:145. [PMID: 30342467 PMCID: PMC6195732 DOI: 10.1186/s12871-018-0608-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 10/05/2018] [Indexed: 01/27/2023] Open
Abstract
Background Postoperative pain is one of the most common symptoms after surgery, which brings physical discomfort to patients. In addition, it may cause a series of complications, and even affect the long-term quality of life. The purpose of this prospective, randomized, double-blinded, controlled trial is to investigate the efficacy and safety of dexmedetomidine combined with sufentanil to attenuate postoperative pain in patients after laparoscopic nephrectomy. Methods Ninety patients undergoing laparoscopic nephrectomy were randomized into three groups: the control (sufentanil 0.02 μg/kg/h, Group C), sufentanil plus low dose of dexmedetomidine (0.02 μg/kg/h each, Group D1), and sufentanil plus high dose of dexmedetomidine (0.04 μg/kg/h, Group D2). The patient-controlled analgesia was programmed to deliver a bolus dose of 0.5 ml, followed by an infusion of 2 ml/h and a lockout time of 10 min. The primary goal was to calculate the cumulative amount of self-administered sufentanil; the secondary goals were to estimate pain intensity using the numerical rating scale (NRS), level of sedation, the first bowel movement, concerning adverse effects as well as duration of postoperative hospital stay. Results The total consumption of sufentanil in group D1 and D2 were significantly lower than in group C during the first 8 h after surgery (P < 0.05), whereas there were no statistically significant differences (P > 0.05) between group D1 and D2. Compared with group C, the NRS scores at rest during first 8 h after surgery were significantly lower in group D1 (P < 0.05). The NRS scores, neither at rest nor with movement, show statistically significant differences between group D1 and D2 at each time point following surgery (P > 0.05). The time to first flatus was shorter in group D1 compared with the control group (P < 0.05). In addition, compared with group C, group D1 and D2 had a shorter time for first defecation (P < 0.05). Conclusions Dexmedetomidine combined with sufentanil showed better postoperative analgesia without adverse effects, as well as facilitated bowel movements for patients undergoing laparoscopic nephrectomy. Trial registration We registered this study in a Chinese Clinical Trial Registry (ChiCTR) centre on Dec 23 2015 and received the registration number: ChiCTR-IPR-15007628.
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Affiliation(s)
- Fuxi Song
- Department of Anaesthesiology, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China
| | - Chunmiao Ye
- Department of Breast Surgery, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China
| | - Feng Qi
- Department of Anaesthesiology, Qilu Hospital of Shandong University, No. 107 Wenhua West Road, Jinan, 250012, China
| | - Ping Zhang
- Department of Breast Surgery, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China
| | - Xuexiang Wang
- The Institute for Translational Medicine, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China
| | - Yanfeng Lü
- Department of Anoproctology, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China
| | - Alejandro Fernandez-Escobar
- Translational Research Program, University of Toronto, 27 King's College Circle, Toronto, ON, M5S 1A1, Canada
| | - Chao Zheng
- Department of Breast Surgery, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China.
| | - Liang Li
- Department of Breast Surgery, the Second Hospital of Shandong University, No. 247 Beiyuan Street, Jinan, 250033, China.
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Pannemans J, Vanuytsel T, Tack J. New developments in the treatment of opioid-induced gastrointestinal symptoms. United European Gastroenterol J 2018; 6:1126-1135. [PMID: 30288274 PMCID: PMC6169055 DOI: 10.1177/2050640618796748] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/22/2018] [Indexed: 12/24/2022] Open
Abstract
Chronic pain affects a large part of the global population, leading to an increase of opioid use. Opioid-induced constipation (OIC), a highly prevalent adverse effect of opioid use, has a major impact on patients' quality of life. Thanks to the introduction of new drugs for chronic constipation, which can also be used in OIC, and the development of peripherally acting mu-opioid receptor blockers, specifically for use in OIC, therapeutic options have seen major development. This review summarises current and emerging treatment options for OIC based on an extensive bibliographical search. Efficacy data for laxatives, lubiprostone, prucalopride, linaclotide, oxycodone/naloxone combinations, methylnaltrexone, alvimopan, naloxegol, naldemedine, axelopran, and bevenopran in OIC are summarised.
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Affiliation(s)
- Jasper Pannemans
- Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism and Ageing, KU Leuven University, Leuven, Belgium
| | - Tim Vanuytsel
- Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism and Ageing, KU Leuven University, Leuven, Belgium
| | - Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), Department of Chronic Diseases, Metabolism and Ageing, KU Leuven University, Leuven, Belgium
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63
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Bruin FD, Hek K, Lieshout JV, Verduijn M, Langendijk P, Bouvy M, Teichert M. Laxative co-medication and changes in defecation patterns during opioid use. J Oncol Pharm Pract 2018; 25:1613-1621. [PMID: 30260269 PMCID: PMC6716205 DOI: 10.1177/1078155218801066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Introduction Opioid-induced constipation is a clinically relevant side effect and a cause
of potentially avoidable drug-related hospital admissions. Objectives To describe the presence of laxative co-medication, the reasons for not
starting laxatives and to evaluate changes in stool patterns of opioid
initiators. Methods In this observational study community pharmacists evaluated the availability
of laxative co-medication in starting opioid users and registered reasons
for non-use. Two opioid initiators per pharmacy were invited to complete
questionnaires (‘Bristol stool form scale’ and ‘Rome III Diagnostic
Questionnaire for the Adult Functional Gastrointestinal Disorders’) on their
defecation prior to and during opioid use. Descriptive statistics and Chi
square tests were used to analyse reasons for non-use of laxatives and
changes in defecation patterns. Results Eighty-one pharmacists collected data from 460 opioid initiators. Of those,
344 (74.8%) used laxatives concomitantly. Main reason not to use laxatives
was that either prescribers or patients did not consider them necessary.
Sixty-seven (89.3%) of the 75 opioid starters with two questionnaires
completed were not constipated at opioid start. Eleven of them (16%)
developed constipation during opioid use (Chi square p=0.003). At follow-up
within laxative users 10.6% were constipated compared to 20.7% in subjects
without laxatives. Conclusion One in four opioid starters did not dispose of laxative co-medication, mainly
because they were not considered necessary by either the prescriber or the
patient. The prevalence of constipation doubled during opioid use. A
watchful waiting strategy for the use of laxative co-medication might
include a monitoring of defecation patterns with validated
questionnaires.
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Affiliation(s)
- Frans de Bruin
- 1 Division of Pharmacoepidemiology and Clinical Pharmacology, Department of Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Karin Hek
- 2 Netherlands Institute for Health Services Research, Utrecht, The Netherlands
| | - Jan van Lieshout
- 3 Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Monique Verduijn
- 4 Department of Guideline Development and Research, Dutch College of General Practitioners, Utrecht, The Netherlands
| | - Pim Langendijk
- 5 Department of Hospital Pharmacy, Reinier de Graaf Group Hospitals, Delft, The Netherlands
| | - Marcel Bouvy
- 1 Division of Pharmacoepidemiology and Clinical Pharmacology, Department of Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Martina Teichert
- 3 Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands.,6 Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, The Netherlands
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64
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Pannemans J, Corsetti M. Opioid receptors in the GI tract: targets for treatment of both diarrhea and constipation in functional bowel disorders? Curr Opin Pharmacol 2018; 43:53-58. [PMID: 30189347 DOI: 10.1016/j.coph.2018.08.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 08/11/2018] [Accepted: 08/13/2018] [Indexed: 02/08/2023]
Abstract
Opioids have been used for centuries, mostly as a sedative and to treat pain. Currently, they are used on a global scale for the treatment of acute and chronic pain in diseases as osteoarthritis, fibromyalgia, and low back pain. Binding of opioids on opioid receptors can cause a range of different effects such as changes in stress response, analgesia, motor activity and autonomic functions. This review provide a synthetic summary of the most recent literature on the use of drugs acting on mu-receptors to treat two prevalent functional bowel disorders, presenting with opposite bowel habit. Eluxadoline and naloxegol, methylnaltrexone and naldemedine are recently FDA and/or EMA approved drugs demonstrated to be effective and safe for treatment respectively of irritable bowel syndrome subtype diarrhea and opioid induced constipation.
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Affiliation(s)
- J Pannemans
- Catholic University of Leuven, KU Leuven, Translational Research Center for Gastrointestinal Disorders (TARGID), Leuven, Belgium
| | - M Corsetti
- NIHR Nottingham Biomedical Research Centre (BRC), Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, UK; Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK.
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65
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Gálvez R, Maire C, Tovar I, Vargas P. Naloxegol to Treat Constipation in a Patient Taking Opioids for Cancer Pain: A Case Report. A A Pract 2018; 11:22-24. [PMID: 29634552 DOI: 10.1213/xaa.0000000000000726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Opioid-induced constipation (OIC) is a common gastrointestinal adverse effect of opioids, which can severely affect compliance and adherence to pain medication regimens and quality of life. Naloxegol has demonstrated efficacy against OIC in several studies involving patients with nonmalignant chronic pain. Here we report efficacy and tolerability of naloxegol in a 68-year-old patient with metastatic lung cancer and severe pain, treated with opioids, who presented with OIC resistant to traditional measures. Addition of naloxegol produced rapid improvement in his OIC symptoms and no apparent adverse effects while taking extended-release morphine 130 mg orally every 12 hours.
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Affiliation(s)
| | | | - Isabel Tovar
- Radiotherapy Service, Hospital Virgen de las Nieves, Granada, Spain
| | - Pilar Vargas
- Radiotherapy Service, Hospital Virgen de las Nieves, Granada, Spain
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66
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Bjorling DE, Wang ZY. Potential of Endocannabinoids to Control Bladder Pain. Front Syst Neurosci 2018; 12:17. [PMID: 29867382 PMCID: PMC5962905 DOI: 10.3389/fnsys.2018.00017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 04/24/2018] [Indexed: 12/21/2022] Open
Abstract
Bladder-related pain is one of the most common forms of visceral pain, and visceral pain is among the most common complaints for which patients seek physician consultation. Despite extensive studies of visceral innervation and treatment of visceral pain, opioids remain a mainstay for management of bladder pain. Side effects associated with opioid therapy can profoundly diminish quality of life, and improved options for treatment of bladder pain remain a high priority. Endocannabinoids, primarily anandamide (AEA) and 2-arachidonoylglycerol (2-AG), are endogenously-produced fatty acid ethanolamides with that induce analgesia. Animal experiments have demonstrated that inhibition of enzymes that degrade AEA or 2-AG have the potential to prevent development of visceral and somatic pain. Although experimental results in animal models have been promising, clinical application of this approach has proven difficult. In addition to fatty acid amide hydrolase (FAAH; degrades AEA) and monacylglycerol lipase (MAGL; degrades 2-AG), cyclooxygenase (COX) acts to metabolize endocannabinoids. Another potential limitation of this strategy is that AEA activates pro-nociceptive transient receptor potential vanilloid 1 (TRPV1) channels. Dual inhibitors of FAAH and TRPV1 or FAAH and COX have been synthesized and are currently undergoing preclinical testing for efficacy in providing analgesia. Local inhibition of FAAH or MAGL within the bladder may be viable options to reduce pain associated with cystitis with fewer systemic side effects, but this has not been explored. Further investigation is required before manipulation of the endocannabinoid system can be proven as an efficacious alternative for management of bladder pain.
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Affiliation(s)
- Dale E Bjorling
- School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - Zun-Yi Wang
- School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
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67
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Piekielna-Ciesielska J, Mollica A, Pieretti S, Fichna J, Szymaszkiewicz A, Zielińska M, Kordek R, Janecka A. Antinociceptive potency of a fluorinated cyclopeptide Dmt-c[D-Lys-Phe-p-CF 3-Phe-Asp]NH 2. J Enzyme Inhib Med Chem 2018. [PMID: 29513114 PMCID: PMC6010070 DOI: 10.1080/14756366.2018.1441839] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Opioid peptides and opiate drugs such as morphine, mediate their analgesic effects, but also undesired side effects, mostly through activation of the mu opioid receptor. However, delta- and kappa-opioid receptors can also contribute to the analgesic effects of opioids. Recent findings showed that simultaneous activation of multiple opioid receptors may result in additional analgesia with fewer side effects. Here, we evaluated the pharmacological profile of our formerly developed mixed mu/kappa-opioid receptor ligands, Dmt-c[D-Lys-Phe-Phe-Asp]NH2 (C-36) and Dmt-c[D-Lys-Phe-p-CF3-Phe-Asp]NH2 (F-81). The ability of these peptides to cross the blood–brain barrier was tested in the parallel artificial membrane permeability (PAMPA) assay. On the basis of the hot-plate test in mice after central and peripheral administration, analog F-81 was selected for the anti-nociceptive and anti-inflammatory activity assessment after peripheral administration.
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Affiliation(s)
| | - Adriano Mollica
- b Department of Pharmacy , University "'G. d'Annunzio"' of Chieti-Pescara , Chieti , Italy
| | - Stefano Pieretti
- c Istituto Superiore di Sanità , National Center for Drug Research and Evaluation , Rome , Italy
| | - Jakub Fichna
- d Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Poland
| | - Agata Szymaszkiewicz
- d Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Poland
| | - Marta Zielińska
- d Department of Biochemistry, Faculty of Medicine , Medical University of Lodz , Poland
| | - Radzisław Kordek
- e Department of Pathology, Faculty of Medicine , Medical University of Lodz , Lodz , Poland
| | - Anna Janecka
- a Department of Biomolecular Chemistry, Faculty of Medicine , Medical University of Lodz , Lodz , Poland
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Grønlund D, Poulsen JL, Krogh K, Brock C, Liao D, Gregersen H, Drewes AM, Olesen AE. The impact of naloxegol on anal sphincter function - Using a human experimental model of opioid-induced bowel dysfunction. Eur J Pharm Sci 2018; 117:187-192. [PMID: 29432808 DOI: 10.1016/j.ejps.2018.02.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/23/2018] [Accepted: 02/06/2018] [Indexed: 01/01/2023]
Abstract
BACKGROUND AND AIMS Opioid treatment interferes with anal sphincter function and its regulation during defecation. This may result in straining, incomplete evacuation, and contribute to opioid-induced bowel dysfunction (OIBD). Employing an experimental model of oxycodone-induced OIBD, we hypothesized that co-administration of the peripherally acting μ-opioid antagonist naloxegol would improve anal sphincter function in comparison to placebo. METHODS In a double-blind randomized crossover trial, 24 healthy males were assigned to a six-day treatment of oral oxycodone 15 mg twice daily in combination with either oral naloxegol 25 mg once daily or placebo. At baseline and at day 6, anal resting pressure and the recto-anal inhibitory reflex (RAIR) were evaluated using manometry and rectal balloon distension. Furthermore, the functional lumen imaging probe was used to measure distensibility of the anal canal. Gastrointestinal symptoms were assessed with the Patient Assessment of Constipation Symptom (PAC-SYM) questionnaire and the Bristol Stool Form Scale. RESULTS During oxycodone treatment, naloxegol improved RAIR-induced sphincter relaxation by 15% (-45.9 vs -38.8 mm Hg; P < 0.01). No differences in anal resting pressure and anal canal distensibility were found between treatments (all P > 0.5). Naloxegol improved PAC-SYM symptoms (mean score over days; 2.6 vs 4.5, P < 0.001) and improved stool consistency scores (mean score over days; 3.3 vs 2.9, P < 0.01). CONCLUSIONS In this experimental model of OIBD, naloxegol improved the RAIR and reduced gastrointestinal symptoms. Hence, in contrast to conventional laxatives, naloxegol may regulate opioid-induced anal sphincter dysfunction and facilitate the defecation process.
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Affiliation(s)
- Debbie Grønlund
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Jakob L Poulsen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Klaus Krogh
- Neurogastroenterology Unit, Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
| | - Christina Brock
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark; Department of Drug Design and Pharmacology, University of Copenhagen, Denmark
| | - Donghua Liao
- GIOME Academia, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Hans Gregersen
- GIOME, Department of Surgery, Chinese University of Hong Kong and Prince of Wales Hospital, Shatin, Hong Kong
| | - Asbjørn M Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Anne E Olesen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark; Department of Drug Design and Pharmacology, University of Copenhagen, Denmark.
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69
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Implementation of a risk-stratified opioid weaning protocol in a pediatric intensive care unit. J Crit Care 2018; 43:214-219. [DOI: 10.1016/j.jcrc.2017.08.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 08/25/2017] [Accepted: 08/26/2017] [Indexed: 12/16/2022]
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70
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Poulsen JL, Mark EB, Brock C, Frøkjær JB, Krogh K, Drewes AM. Colorectal Transit and Volume During Treatment With Prolonged-release Oxycodone/Naloxone Versus Oxycodone Plus Macrogol 3350. J Neurogastroenterol Motil 2018; 24:119-127. [PMID: 29291613 PMCID: PMC5753910 DOI: 10.5056/jnm17058] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/21/2017] [Accepted: 10/13/2017] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND/AIMS Opioid-induced constipation (OIC) is the most common gastrointestinal (GI) side effect to opioid treatment. Opioid receptor antagonists against OIC have been introduced, but their efficacy has not been directly compared to conventional laxatives. Our aim was to compare symptoms and objective parameters of gut function in an experimental model of OIC during treatment with the opioid antagonist naloxone and oxycodone in prolonged-release (PR) formulation versus oxycodone plus macrogol 3350. METHODS In this randomized, double-blind, crossover trial 20 healthy men received a 5-day treatment of combined PR oxycodone/naloxone or PR oxycodone plus macrogol 3350. Regional GI transit times and segmental colorectal transit were assessed with the Motilis 3D-Transit electromagnetic capsule system. Colorectal volumes were determined by MRI. OIC symptoms were assessed with validated questionnaires, along with stool frequency and consistency. RESULTS Total colorectal volume did not change after 5 days' treatment with PR oxycodone/naloxone (941 vs 1036 mL; P = 0.091), but increased significantly after PR oxycodone plus macrogol treatment (912 vs 1123 mL; P < 0.001). Neither regional GI transit times nor segmental colorectal transit differed between the treatments (all P > 0.05). The Patient Assessment of Constipation Symptom Questionnaire abdominal symptoms score was lower during PR oxycodone/naloxone compared to PR oxycodone plus macrogol (0.2 vs 3.2; P = 0.002). Stool frequency was lower during PR oxycodone/naloxone compared to PR oxycodone plus macrogol (4.2 vs 5.4; P = 0.035). CONCLUSIONS PR oxycodone plus macrogol increases colorectal volume, but does not improve GI transit compared to PR oxycodone/naloxone. However, PR oxycodone/naloxone results in a lower abdominal symptom burden, despite higher stool frequency during macrogol treatment.
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Affiliation(s)
- Jakob L Poulsen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg,
Denmark
| | - Esben B Mark
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg,
Denmark
| | - Christina Brock
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg,
Denmark
- Department of Clinical Medicine, Aalborg University, Aalborg,
Denmark
- Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen,
Denmark
| | - Jens B Frøkjær
- Department of Clinical Medicine, Aalborg University, Aalborg,
Denmark
- Mech-Sense, Department of Radiology, Aalborg University Hospital, Aarhus,
Denmark
| | - Klaus Krogh
- Neurogastroenterology Unit, Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus,
Denmark
| | - Asbjørn M Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg,
Denmark
- Department of Clinical Medicine, Aalborg University, Aalborg,
Denmark
- Correspondence: Asbjørn M Drewes, MD, PhD, DMSc, Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Mølleparkvej 4, DK-9000 Aalborg, Denmark, Tel: +45-9766-3562, Fax: +45-9766-3577, E-mail:
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71
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O'Brien T, Christrup LL, Drewes AM, Fallon MT, Kress HG, McQuay HJ, Mikus G, Morlion BJ, Perez-Cajaraville J, Pogatzki-Zahn E, Varrassi G, Wells JCD. European Pain Federation position paper on appropriate opioid use in chronic pain management. Eur J Pain 2018; 21:3-19. [PMID: 27991730 PMCID: PMC6680203 DOI: 10.1002/ejp.970] [Citation(s) in RCA: 135] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/01/2016] [Indexed: 02/06/2023]
Abstract
Poorly controlled pain is a global public health issue. The personal, familial and societal costs are immeasurable. Only a minority of European patients have access to a comprehensive specialist pain clinic. More commonly the responsibility for chronic pain management and initiating opioid therapy rests with the primary care physician and other non‐specialist opioid prescribers. There is much confusing and conflicting information available to non‐specialist prescribers regarding opioid therapy and a great deal of unjustified fear is generated. Opioid therapy should only be initiated by competent clinicians as part of a multi‐faceted treatment programme in circumstances where more simple measures have failed. Throughout, all patients must be kept under close clinical surveillance. As with any other medical therapy, if the treatment fails to yield the desired results and/or the patient is additionally burdened by an unacceptable level of adverse effects, the overall management strategy must be reviewed and revised. No responsible clinician will wish to pursue a failed treatment strategy or persist with an ineffective and burdensome treatment. In a considered attempt to empower and inform non‐specialist opioid prescribers, EFIC convened a European group of experts, drawn from a diverse range of basic science and relevant clinical disciplines, to prepare a position paper on appropriate opioid use in chronic pain. The expert panel reviewed the available literature and harnessed the experience of many years of clinical practice to produce these series of recommendations. Its success will be judged on the extent to which it contributes to an improved pain management experience for chronic pain patients across Europe. Significance This position paper provides expert recommendations for primary care physicians and other non‐ specialist healthcare professionals in Europe, particularly those who do not have ready access to specialists in pain medicine, on the safe and appropriate use of opioid medications as part of a multi‐faceted approach to pain management, in properly selected and supervised patients.
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Affiliation(s)
- T O'Brien
- Marymount University Hospital & Hospice, Curraheen, Cork, Ireland.,Cork University Hospital, Wilton, Cork and College of Medicine and Health, University College, Cork, Ireland
| | - L L Christrup
- Department of Drug Design and Pharmacology, University of Copenhagen, Denmark
| | - A M Drewes
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Denmark
| | - M T Fallon
- Edinburgh Cancer Research Centre, University of Edinburgh, UK
| | - H G Kress
- Department of Special Anaesthesia and Pain Therapy, Medical University of Vienna/AKH, Austria
| | | | - G Mikus
- Department of Clinical Pharmacology and Pharmacoepidemiology, University Hospital, Heidelberg, Germany
| | - B J Morlion
- Leuven Centre for Algology & Pain Management, University Hospital Leuven, Belgium
| | | | - E Pogatzki-Zahn
- Department of Anesthesiology, Intensive Care and Pain Medicine, University Hospital Müenster, Germany
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72
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Koopmans-Klein G, Van Op den Bosch J, van Megen Y, Prenen H, Huygen F, Mancini I. Prolonged release oxycodone and naloxone treatment counteracts opioid-induced constipation in patients with severe pain compared to previous analgesic treatment. Curr Med Res Opin 2017; 33:2217-2227. [PMID: 28805471 DOI: 10.1080/03007995.2017.1367276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Treatment with prolonged-release oxycodone/naloxone (PR OXN) has been shown to improve opioid induced constipation (OIC) in constipated patients. This publication reports on a real-life observational study investigating the efficacy of PR OXN with regard to bowel function in patients switching to PR OXN from WHO step 1, step 2 and step 3 opioids. METHODS Patients with chronic pain experiencing insufficient pain relief and/or unacceptable side effects were switched to PR OXN and monitored in this observational study with respect to efficacy regarding bowel function and efficacy regarding pain relief in comparison with previous analgesic therapy. A patient was considered a responder with respect to efficacy if this assessment was "slightly better", "better" or "much better" compared with previous therapy. Bowel function index, pain intensity, quality of life, laxative medication use, and safety analgesic were also evaluated. RESULTS A total of 1338 patients (mean [SD] age 64.3 [14.9], 63% female) were observed for 43 [3-166] days (median [range]) during treatment with PR OXN. Overall response rate regarding bowel function efficacy was 82.5%. Patients with symptoms of constipation at study entry obtained a clinically relevant improvement of the bowel function index (BFI) within the first 2 weeks of PR OXN treatment. Non-constipated patients at study entry maintained normal bowel function despite switching to treatment with the opioid PR OXN. CONCLUSION In conclusion, treatment with PR OXN results in a significant and clinically relevant improvement of bowel function. During the observation of the treatment with PR OXN patients reported an improvement of quality of life (QoL). More interestingly, non-constipated patients maintained a normal bowel function, showing prevention of constipation despite the use of an opioid.
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Affiliation(s)
- Gineke Koopmans-Klein
- a Mundipharma Pharmaceuticals BV , Medical Department , Leusden , The Netherlands
- b Center for Pain Medicine, Erasmus MC , Rotterdam , The Netherlands
| | | | - Yvonne van Megen
- a Mundipharma Pharmaceuticals BV , Medical Department , Leusden , The Netherlands
| | - Hans Prenen
- d Digestive Oncology Unit , University Hospital Leuven , Leuven , Belgium
| | - Frank Huygen
- b Center for Pain Medicine, Erasmus MC , Rotterdam , The Netherlands
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73
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Morlion BJ, Mueller-Lissner SA, Vellucci R, Leppert W, Coffin BC, Dickerson SL, O'Brien T. Oral Prolonged-Release Oxycodone/Naloxone for Managing Pain and Opioid-Induced Constipation: A Review of the Evidence. Pain Pract 2017; 18:647-665. [DOI: 10.1111/papr.12646] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 09/14/2017] [Accepted: 09/21/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Bart J. Morlion
- Leuven Centre for Algology and Pain Management; Anaesthesiology and Algology; Department of Cardiovascular Sciences; University Hospitals Leuven; University of Leuven; Leuven Belgium
| | | | - Renato Vellucci
- Palliative Care and Pain Therapy Unit; University Hospital; Careggi Florence Italy
| | - Wojciech Leppert
- Department of Palliative Medicine; Poznan University of Medical Sciences; Poznan Poland
- Department of Quality of Life Research; Medical University of Gdansk; Gdansk Poland
| | - Benoît C. Coffin
- Department of Gastroenterology; Louis Mourier Hospital; Assistance Publique - Hôpitaux de Paris; Colombes France
- University Denis Diderot-Paris VII; Paris France
| | - Sara L. Dickerson
- Mundipharma International Ltd; Cambridge Science Park; Cambridge U.K
| | - Tony O'Brien
- Marymount University Hospital and Hospice; Cork Ireland
- Cork University Hospital and College of Medicine and Health; University College Cork; Cork Ireland
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74
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Webster L, Diva U, Tummala R, Sostek M. Treatment with Naloxegol Versus Placebo: Pain Assessment in Patients with Noncancer Pain and Opioid-Induced Constipation. Pain Pract 2017; 18:505-514. [PMID: 28898536 DOI: 10.1111/papr.12640] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/18/2017] [Accepted: 09/06/2017] [Indexed: 12/29/2022]
Abstract
OBJECTIVE To summarize results from pain and opioid use assessments with naloxegol in adults with opioid-induced constipation (OIC) and chronic noncancer pain. METHODS Two phase 3 randomized, double-blind, 12-week studies evaluated the efficacy and safety of oral naloxegol (12.5 or 25 mg daily) in adults (18 to < 85 years) with confirmed OIC and chronic noncancer pain: KODIAC-04 (NCT01309841) and KODIAC-05 (NCT01323790). Pain level was assessed daily (11-point numeric rating scale [NRS]; 0 = no pain, 10 = worst imaginable pain). Changes from baseline in mean weekly pain scores and opioid dose (weeks 1 through 12) were analyzed using mixed-model repeated measures. RESULTS At baseline, mean daily NRS average pain scores ranged from 4.5 to 4.8 for all groups in KODIAC-04 (N = 652) and were 4.6 for each group in KODIAC-05 (N = 700). Respective mean ± SD changes from baseline average pain for placebo, naloxegol 12.5 mg, and naloxegol 25 mg were -0.2 ± 1.07, -0.3 ± 1.05 (P = 0.773 vs. placebo), and 0.2 ± 0.95 (P = 0.837 vs. placebo; KODIAC-04) and -0.1 ± 0.94, -0.1 ± 0.87 (P = 0.744), and 0.0 ± 1.18 (P = 0.572; KODIAC-05). At baseline, mean daily opioid doses ranged from 135.6 to 143.2 morphine equivalent units (MEUs)/day in KODIAC-04, and from 119.9 to 151.7 MEUs/day in KODIAC-05. Respective mean ± SD changes from baseline dose were -1.8 ± 30.19, -2.3 ± 20.52 (P = 0.724 vs. placebo), and 0.4 ± 13.01 (P = 0.188 vs. placebo; KODIAC-04) and -0.3 ± 17.14, -1.3 ± 17.11 (P = 0.669 vs. placebo), and 0.1 ± 8.54 (P = 0.863 vs. placebo; KODIAC-05). Changes in maintenance opioid dose were few; reasons for such changes were similar across treatment groups. CONCLUSION Centrally mediated opioid analgesia was maintained during treatment with naloxegol in patients with noncancer pain and OIC.
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Affiliation(s)
- Lynn Webster
- PRA Health Sciences, Salt Lake City, Utah, U.S.A
| | - Ulysses Diva
- Bioinformatics and Information Sciences, AstraZeneca Pharmaceuticals LP, Gaithersburg, Maryland, U.S.A
| | - Raj Tummala
- Global Medicines Development, AstraZeneca Pharmaceuticals LP, Gaithersburg, Maryland, U.S.A
| | - Mark Sostek
- Global Medicines Development, AstraZeneca Pharmaceuticals LP, Gaithersburg, Maryland, U.S.A
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Poulsen JL, Brock C, Grønlund D, Liao D, Gregersen H, Krogh K, Drewes AM. Prolonged-Release Oxycodone/Naloxone Improves Anal Sphincter Relaxation Compared to Oxycodone Plus Macrogol 3350. Dig Dis Sci 2017; 62:3156-3166. [PMID: 28986667 DOI: 10.1007/s10620-017-4784-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 09/27/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND Opioid analgesics inhibit anal sphincter function and contribute to opioid-induced bowel dysfunction (OIBD). However, it is unknown whether the inhibition can be reduced by opioid antagonism with prolonged-release (PR) naloxone and how this compares to laxative treatment. AIMS To compare the effects of combined PR oxycodone/naloxone or PR oxycodone plus macrogol 3350 on anal sphincter function and gastrointestinal symptoms. METHODS A randomized, double-blind, crossover trial was conducted in 20 healthy men. Participants were treated for 5 days with combined PR oxycodone/naloxone or PR oxycodone plus macrogol 3350. Resting anal pressure, anal canal distensibility, and relaxation of the internal sphincter to rectal distension were evaluated before treatment (baseline) and on day 5. The Patient Assessment of Constipation Symptom (PAC-SYM) questionnaire, stool frequency, and stool consistency were assessed daily. RESULTS Both PR oxycodone/naloxone and PR oxycodone plus macrogol treatment decreased sphincter relaxation compared to baseline (- 27.5%; P < 0.001 and - 14.7%; P = 0.01). However, sphincter relaxation was increased after PR naloxone/oxycodone treatment compared to macrogol (difference = + 17.6%; P < 0.001). Resting anal pressure and anal canal distensibility did not differ between treatments. PAC-SYM abdominal symptoms score was lower during PR naloxone compared to macrogol (0.2 vs. 3.2; P = 0.002). The number of bowel movements was lower during PR naloxone versus macrogol (4.2 vs. 5.4; P = 0.035). CONCLUSION Relaxation of the internal anal sphincter was significantly better after PR oxycodone/naloxone treatment compared to PR oxycodone plus macrogol 3350. These findings highlight that OIBD may require specific therapy against the complex, pan-intestinal effects of opioids.
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Affiliation(s)
- Jakob Lykke Poulsen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000, Aalborg, Denmark
| | - Christina Brock
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000, Aalborg, Denmark.,Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
| | - Debbie Grønlund
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000, Aalborg, Denmark
| | - Donghua Liao
- GIOME Academia, Department of Clinical Medicine, Aarhus University, Nordre Ringgade 1, 8000, Aarhus, Denmark
| | - Hans Gregersen
- GIOME, Department of Surgery, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, Hong Kong
| | - Klaus Krogh
- Neurogastroenterology Unit, Department of Hepatology and Gastroenterology, Aarhus University Hospital, Nørrebrogade 44, 8000, Aarhus, Denmark
| | - Asbjørn Mohr Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Mølleparkvej 4, 9000, Aalborg, Denmark. .,Department of Clinical Medicine, Aalborg University, Sdr. Skovvej 15, 9000, Aalborg, Denmark.
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76
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Olesen SS, Frandsen LK, Poulsen JL, Vestergaard P, Rasmussen HH, Drewes AM. The prevalence of underweight is increased in chronic pancreatitis outpatients and associates with reduced life quality. Nutrition 2017; 43-44:1-7. [DOI: 10.1016/j.nut.2017.06.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 06/21/2017] [Accepted: 06/25/2017] [Indexed: 02/06/2023]
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Müller-Lissner S, Bassotti G, Coffin B, Drewes AM, Breivik H, Eisenberg E, Emmanuel A, Laroche F, Meissner W, Morlion B. Opioid-Induced Constipation and Bowel Dysfunction: A Clinical Guideline. PAIN MEDICINE (MALDEN, MASS.) 2017; 18:1837-1863. [PMID: 28034973 PMCID: PMC5914368 DOI: 10.1093/pm/pnw255] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To formulate timely evidence-based guidelines for the management of opioid-induced bowel dysfunction. SETTING Constipation is a major untoward effect of opioids. Increasing prescription of opioids has correlated to increased incidence of opioid-induced constipation. However, the inhibitory effects of opioids are not confined to the colon, but also affect higher segments of the gastrointestinal tract, leading to the coining of the term "opioid-induced bowel dysfunction." METHODS A literature search was conducted using Medline, EMBASE, and EMBASE Classic, and the Cochrane Central Register of Controlled Trials. Predefined search terms and inclusion/exclusion criteria were used to identify and categorize relevant papers. A series of statements were formulated and justified by a comment, then labeled with the degree of agreement and their level of evidence as judged by the Strength of Recommendation Taxonomy (SORT) system. RESULTS From a list of 10,832 potentially relevant studies, 33 citations were identified for review. Screening the reference lists of the pertinent papers identified additional publications. Current definitions, prevalence, and mechanism of opioid-induced bowel dysfunction were reviewed, and a treatment algorithm and statements regarding patient management were developed to provide guidance on clinical best practice in the management of patients with opioid-induced constipation and opioid-induced bowel dysfunction. CONCLUSIONS In recent years, more insight has been gained in the pathophysiology of this "entity"; new treatment approaches have been developed, but guidelines on clinical best practice are still lacking. Current knowledge is insufficient regarding management of the opioid side effects on the upper gastrointestinal tract, but recommendations can be derived from what we know at present.
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Affiliation(s)
| | - Gabrio Bassotti
- Gastroenterology and Hepatology Section, Department of Medicine, University of Perugia School of Medicine, Piazza Università, 1, Perugia, Italy
| | - Benoit Coffin
- AP-HP Hôpital Louis Mourier, University Denis Diderot-Paris 7, INSERM U987, Paris, France
| | - Asbjørn Mohr Drewes
- Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Harald Breivik
- Department of Pain Management and Research, University of Oslo, Rikshospitalet, Oslo, Norway
| | - Elon Eisenberg
- Institute of Pain Medicine, Rambam Health Care Campus, The Technion, Israel Institute of Technology, Haifa, Israel
| | - Anton Emmanuel
- GI Physiology Unit, University College Hospital, Queen Square, London, UK
| | | | | | - Bart Morlion
- The Leuven Center for Algology and Pain Management, University of Leuven, KU Leuven, Leuven, Belgium
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Peng K, Zhang J, Chen WR, Liu HY, Ji FH. Ultrasound-guided Stellate Ganglion Block Improves Gastrointestinal Function After Thoracolumbar Spinal Surgery. Clin Ther 2017; 39:2322-2330. [PMID: 28974305 DOI: 10.1016/j.clinthera.2017.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/06/2017] [Accepted: 09/12/2017] [Indexed: 02/07/2023]
Abstract
PURPOSE The purpose of this study was to investigate the effects of stellate ganglion block (SGB) on gastrointestinal function after thoracolumbar spinal surgery. METHODS Forty patients with thoracolumbar fracture scheduled for posterior spinal surgery were randomly assigned to 2 groups: ultrasound-guided SGB or sham (control group). After induction, ultrasound-guided SGB (n = 20) or a sham procedure (n = 20) was conducted with a 6-mL injection of 1% lidocaine or 0.9% saline, respectively. Primary outcomes were postoperative gastrointestinal function, including auscultation of bowel sounds, incidence and degree of abdominal bloating, flatus time, and paralytic ileus. FINDINGS Patients in the SGB group had better gastrointestinal function compared with those in the sham (control) group, as indicated by more regular bowel sounds at 24 and 36 hours postoperatively (80% vs 40%, P = 0.024, and 95% vs 60%, P = 0.023), lesser abdominal bloating (10% vs 45%, P = 0.034), and slightly shorter flatus time (mean [SD], 12.0 [4.4] vs 14.7 [4.6] hours, P = 0.068). Survival analysis based on regular bowel sounds found a significant difference between the 2 groups (P = 0.004). In addition, more patients had higher satisfaction after SGB (85% vs 45%, P = 0.020). No postoperative ileus or mortality occurred. IMPLICATIONS In this preliminary study, ultrasound-guided SGB accelerated the return of gastrointestinal transit, alleviated bowel symptoms, and improved patient satisfaction after thoracolumbar spinal surgery. chictr.org.cn identifier: ChiCTR-TRC-14004289.
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Affiliation(s)
- Ke Peng
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Juan Zhang
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Wei-Rong Chen
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Hua-Yue Liu
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China
| | - Fu-Hai Ji
- Department of Anesthesiology, First Affiliated Hospital of Soochow University, Suzhou, China.
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79
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Naloxegol for managing opioid-induced constipation. JAAPA 2017; 30:51-53. [DOI: 10.1097/01.jaa.0000522146.29435.c7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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80
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Jiang L, Beattie DT, Jacobsen JR, Kintz S, Obedencio GP, Saito D, Stergiades I, Vickery RG, Long DD. Discovery of N -substituted- endo -3-(8-aza-bicyclo[3.2.1]oct-3-yl)-phenol and -phenyl carboxamide series of μ-opioid receptor antagonists. Bioorg Med Chem Lett 2017; 27:2926-2930. [DOI: 10.1016/j.bmcl.2017.04.092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/29/2017] [Accepted: 04/30/2017] [Indexed: 01/23/2023]
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Opioid-Induced Bowel Dysfunction in Patients Undergoing Spine Surgery: Comparison of Oxycodone and Oxycodone-Naloxone Treatment. Adv Ther 2017; 34:236-251. [PMID: 27921252 PMCID: PMC5216064 DOI: 10.1007/s12325-016-0456-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Indexed: 11/28/2022]
Abstract
Introduction Opioids are needed for postoperative pain in spine surgery patients, but opioid-induced constipation is a harmful adverse event. The aim of this clinical trial was to compare the use of a controlled-release oxycodone-naloxone combination product with oxycodone controlled-release tablets in these patients. The main outcome measure was the prevalence of constipation at 7 days postoperatively assessed with a Bowel Function Index questionnaire. A follow-up assessment at 21 days after surgery was also included. Methods A total of 180 patients undergoing spine surgery, 91 having preoperative opioids in use and 89 opioid-naïve, were randomized to receive twice-daily oxycodone 10 mg or oxycodone-naloxone 10/5 mg controlled-release tablets for the first 7 postoperative days. Patients were followed-up for 21 days after surgery. Results At baseline, prevalence of constipation was common both in the opioid-naïve—25/87 (29%) and on-opioid groups 43/90 (48%) (P = 0.009). This increased at 7 days postoperatively with no difference between the groups, 54/89 with oxycodone and 54/88 with oxycodone-naloxone had constipation. At 21 days, constipation was less than in the baseline in both groups, in the opioid-naïve group the prevalence of constipation was 3/43 (7%) in patients with oxycodone-naloxone compared to 9/44 (21%) with oxycodone (effect size 0.68; P = 0.068). Both study compounds provided similar pain relief and were well tolerated. Conclusion In patients presented for back surgery, the prevalence of constipation was significantly higher than that in the community. In opioid-naïve subjects, oxycodone-naloxone was beneficial concerning constipation; but this was not distinguishable in subjects with chronic opioid use. The analgesic efficacy of oxycodone and oxycodone-naloxone was similar. Trial registration: European Clinical Trials Database (EudraCT no. 2012-001816-42) and ClinicalTrials.gov database (Identifier: NCT02573922).
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Nilsson M, Brock C, Poulsen JL, Bindslev N, Hansen MB, Louring Christrup L, Drewes AM. Short-term oxycodone treatment does not affect electrogenic ion transport in isolated mucosa from the human rectosigmoid colon. Scand J Gastroenterol 2016; 51:538-47. [PMID: 26610166 DOI: 10.3109/00365521.2015.1116108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Opioid therapy is associated with altered secretion and motility of the gut. The relative contribution of decreased secretion to the development of opioid-induced constipation remains unknown. MATERIALS AND METHODS Twenty-five healthy males were treated with oxycodone for 5 d in a placebo-controlled, randomised cross-over design. Gastrointestinal adverse effects were assessed with validated questionnaires (bowel function index and gastrointestinal symptom rating scale). Rectosigmoid mucosal biopsies were taken at baseline and on day 5 during both treatments and mounted in Ussing chambers. Electrogenic ion transport parameters (short circuit current (SCC) and slope conductance) were measured after addition of secretagogues (prostaglandin E2 (PGE2) (6 μm), theophylline (400 μm)), and an inhibitor (ouabain (200 μm)). Additionally, morphine (50 μm) was added to investigate the direct opioid effect on colonic mucosa. RESULTS Questionnaires showed pronounced bowel symptoms, including constipation during oxycodone treatment (eight-fold increase in bowel function index score from day 1 to day 5 (p < 0.001) while no significant change occurred during placebo treatment (p = 0.47). Basal SCC and slope conductance did not differ between treatments (all p > 0.05) and application with PGE2, theophylline, and ouabain yielded comparable results on all examinations (all p > 0.05). Morphine application consistently did not evoke a change in ion transport. CONCLUSION Compared to placebo, epithelial electrogenic ion transport is not altered in mucosal biopsies from the rectosigmoid colon following 5-d oxycodone treatment. The secretory mechanisms in isolated mucosa appear to play a negligible role in the development of opioid-induced constipation.
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Affiliation(s)
- Matias Nilsson
- a Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark
| | - Christina Brock
- a Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark ;,b Department of Drug Design and Pharmacology , University of Copenhagen , Copenhagen , Denmark
| | - Jakob Lykke Poulsen
- a Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark
| | - Niels Bindslev
- c Department of Biomedical Sciences, Faculty of Health and Medical Sciences , University of Copenhagen , Copenhagen , Denmark
| | - Mark Berner Hansen
- d Abdominal Center K , Bispebjerg Hospital, University of Copenhagen , Copenhagen , Denmark ;,e AstraZeneca R&D , Mölndal , Sweden
| | - Lona Louring Christrup
- b Department of Drug Design and Pharmacology , University of Copenhagen , Copenhagen , Denmark
| | - A M Drewes
- a Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Aalborg , Denmark ;,f Department of Clinical Medicine , Aalborg University , Aalborg , Denmark
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Chen NY, Nguyen E, Schrager SM, Russell CJ. Factors Associated With the Prophylactic Prescription of a Bowel Regimen to Prevent Opioid-Induced Constipation. Hosp Pediatr 2016; 6:677-683. [PMID: 27803072 PMCID: PMC5794492 DOI: 10.1542/hpeds.2016-0014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
OBJECTIVE Identify factors associated with the prophylactic prescription of a bowel regimen with an inpatient opioid prescription. METHODS This was a retrospective cohort study from June 1, 2013, to October 31, 2014 of pediatric inpatients prescribed an oral or intravenous opioid on the general medical/surgical floors. We identified patients with or without a prophylactic prescription of a bowel regimen. We obtained patient demographics, prescriber training level and service and used multivariate logistic regression to analyze the factors associated with prophylactic bowel regimen and opioid prescription. RESULTS Of the 6682 encounters that met study criteria, only 966 (14.5%) encounters had prophylactic prescriptions. Patient factors associated with prophylactic prescription include increasing age (per year; odds ratio [OR] = 1.06, 95% confidence interval [CI] 1.05-1.07) and sickle cell diagnosis (OR = 3.19, 95% CI 2.08-4.91). Medication factors associated with prophylactic prescription include a scheduled opioid prescription (OR = 1.75, 95% CI 1.46-2.1) and a prescription for oxycodone (OR = 3.59, 95% CI 2.57-5.00) or morphine (OR = 1.84, 95% CI 1.39-2.44), compared with acetaminophen-hydrocodone. Compared with medical providers, surgeons were less likely (OR = 0.43, 95% CI 0.35-0.53) and pain service providers were more likely to prescribe a prophylactic bowel regimen (OR = 4.12, 95% CI 3.13-5.43). CONCLUSIONS More than 85% of inpatient opioid prescriptions did not receive a prophylactic bowel regimen. Future research should examine factors (eg, clinical decision support tools) to increase prophylactic prescription of bowel regimens with opioids for populations found to have lower rates.
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Affiliation(s)
- Nancy Y Chen
- Division of Hospital Medicine, Phoenix Children's Hospital, Phoenix, Arizona;
| | - Eugene Nguyen
- Division of Hospital Medicine, Children's Hospital Los Angeles, Los Angeles, California; and
| | - Sheree M Schrager
- Division of Hospital Medicine, Children's Hospital Los Angeles, Los Angeles, California; and
| | - Christopher J Russell
- Division of Hospital Medicine, Children's Hospital Los Angeles, Los Angeles, California; and
- Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California
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Leppert W, Woron J. The role of naloxegol in the management of opioid-induced bowel dysfunction. Therap Adv Gastroenterol 2016; 9:736-46. [PMID: 27582887 PMCID: PMC4984326 DOI: 10.1177/1756283x16648869] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Opioid-induced constipation (OIC) and other gastrointestinal (GI) symptoms of opioid-induced bowel dysfunction (OIBD) significantly deteriorate patients' quality of life and may lead to noncompliance with opioid schedule and undertreatment of pain. Although traditional oral laxatives are the first-line treatment of OIC, they do not address OIBD pathophysiology, and display numerous adverse effects. OIC treatment includes prokinetics (lubiprostone), opioid switch, and changing route of opioid administration. Targeted management of OIBD comprises the use of purely peripherally acting μ-opioid receptor antagonists (PAMORA): naloxegol and methylnaltrexone. Naloxegol (NKTR-118) is a polymer conjugate of the opioid antagonist naloxone. The polyethylene glycol limits naloxegol capacity to cross the blood-brain barrier (BBB). Naloxegol is substrate for the P-glycoprotein (P-gp) transporter. The central nervous system penetration of naloxegol is negligible due to reduced permeability and its increased efflux across the BBB, related to P-gp transporter. Naloxegol antagonizes μ- and κ-opioid receptors and displays low affinity to δ-opioid receptors in the GI tract, thereby decreasing OIBD symptoms without reversing central analgesic effects. Naloxegol is metabolised through CYP3A4 to six metabolites, with the majority of the dose (68%) excreted with faeces and less (16%) with urine. The dose of naloxegol equals 25 mg administered orally once daily on a fasting condition. Mild or moderate hepatic impairment has no impact on naloxegol dosing; naloxegol was not studied and is not recommended in patients with hepatic failure. Dose reduction (12.5 mg once daily) and caution is recommended in patients with moderate-to-severe renal impairment. Efficacy (bowel movement in 42-49% of patients not responsive to laxatives) and safety of naloxegol were confirmed in studies conducted in patients with OIC and nonmalignant pain. Naloxegol may be useful for cancer patients with OIC, although studies in this population are lacking.
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Affiliation(s)
| | - Jaroslaw Woron
- Department of Clinical Pharmacology, Jagiellonian University College of Medicine, Krakow, Poland,Department of Pain Treatment and Palliative Care, Jagiellonian University College of Medicine, Krakow, Poland
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Williams DA, Zheng Y, David BG, Yuan Y, Zaidi SA, Stevens DL, Scoggins KL, Selley DE, Dewey WL, Akbarali HI, Zhang Y. 6β-N-Heterocyclic Substituted Naltrexamine Derivative BNAP: A Peripherally Selective Mixed MOR/KOR Ligand. ACS Chem Neurosci 2016; 7:1120-9. [PMID: 27269866 DOI: 10.1021/acschemneuro.6b00075] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The 6β-N-heterocyclic naltrexamine derivative, NAP, has been demonstrated to be a peripherally selective mu opioid receptor modulator. To further improve peripheral selectivity of this highly potent ligand, its pyridal ring was quaterinized with benzyl bromide to produce BNAP. In radioligand binding assay, the Ki of BNAP for MOR was 0.76 ± 0.09 nM and was >900-fold more selective for MOR than DOR. The Ki for KOR was 3.46 ± 0.05 nM. In [(35)S]GTPγS ligand stimulated assay, BNAP showed low agonist efficacy with 14.6% of the maximum response of DAMGO with an EC50 of 4.84 ± 0.6 nM. However, unlike its parent compound NAP, BNAP displayed partial agonist activity at KOR with % maximum response at 45.9 ± 1.7% of U50,488H. BNAP did not reverse morphine-induced antinociception when administered subcutaneously but did antagonize when administered intracerebroventricularly. BNAP antagonized morphine-induced contractions of the circular muscle in mice colon. BNAP inhibition of field-stimulated contractions in longitudinal muscle strips for the guinea-pig ileum were also blocked by nor-BNI, a kappa opioid receptor antagonist. BNAP induced inhibition of acetic acid induced abdominal stretching in chronic morphine treated mice. These findings suggest that BNAP is a dual MOR antagonist/KOR agonist and may have functional use in irritable bowel patients.
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Affiliation(s)
- Dwight A. Williams
- Department of Medicinal Chemistry, Virginia Commonwealth University, 800 E. Leigh Street, Richmond, Virginia 23298, United States
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - Yi Zheng
- Department of Medicinal Chemistry, Virginia Commonwealth University, 800 E. Leigh Street, Richmond, Virginia 23298, United States
| | - Bethany G. David
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - Yunyun Yuan
- Department of Medicinal Chemistry, Virginia Commonwealth University, 800 E. Leigh Street, Richmond, Virginia 23298, United States
| | - Saheem A. Zaidi
- Department of Medicinal Chemistry, Virginia Commonwealth University, 800 E. Leigh Street, Richmond, Virginia 23298, United States
| | - David L. Stevens
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - Krista L. Scoggins
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - Dana E. Selley
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - William L. Dewey
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - Hamid I. Akbarali
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States
| | - Yan Zhang
- Department of Medicinal Chemistry, Virginia Commonwealth University, 800 E. Leigh Street, Richmond, Virginia 23298, United States
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Impact of Treatment with Naloxegol for Opioid-Induced Constipation on Patients' Health State Utility. Adv Ther 2016; 33:1331-46. [PMID: 27342744 PMCID: PMC4969326 DOI: 10.1007/s12325-016-0365-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Indexed: 12/02/2022]
Abstract
Introduction Opioid-induced constipation (OIC) is the most common side effect of opioid treatment. Treatment for OIC typically involves a laxative. However, some patients have an inadequate response to these (laxative inadequate responders, or LIR). This has led to the development of treatments such as naloxegol. This analysis estimates the impact of naloxegol on the health state utility of LIR patients, examines if this utility impact is driven by the change in OIC status, and estimates the utility impact of relief of OIC. Methods The analysis was conducted using data from two 12-week randomized controlled trials, KODIAC 4 (ClinicalTrials.gov identifier, NCT01309841) and KODIAC 5 (ClinicalTrials.gov identifier, NCT01323790), plus KODIAC 7 (ClinicalTrials.gov identifier, NCT01395524), a 12-week extension to KODIAC 4. All were designed to assess the efficacy and safety of oral naloxegol (12.5 and 25 mg) compared to placebo. Health state utility data were collected through the EuroQol—five dimensions questionnaire (EQ-5D-3L). Descriptive analysis was undertaken to estimate how EQ-5D utility scores and EQ-5D domain responses varied with treatment, OIC status, and over time. A repeated measure mixed-effects model was used to predict the change from baseline in health state utility score over time. Results Compared with placebo, LIR patients treated with naloxegol 25 mg reported a 0.08 improvement in the EQ-5D overall score after 12 weeks of treatment. The analyses also suggest that change in OIC status is a key driver of the impact of OIC treatment on health state utility. When other factors are controlled, relieving OIC is associated with a 0.05 improvement in health state utility, although treatment with naloxegol is associated with an improvement in health state utility over and above the improvement in OIC status. Conclusion These analyses suggest that treatment with naloxegol improves patients’ health state utility; driven predominantly by the relief of patients’ constipation. Funding AstraZeneca.
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87
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Chokhavatia S, John ES, Bridgeman MB, Dixit D. Constipation in Elderly Patients with Noncancer Pain: Focus on Opioid-Induced Constipation. Drugs Aging 2016; 33:557-74. [PMID: 27417446 PMCID: PMC5012150 DOI: 10.1007/s40266-016-0381-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Constipation is a common and often debilitating condition in the elderly, which may be caused by underlying disease conditions, structural abnormalities in the bowel, and a variety of medications such as anticholinergics, antidepressants, and opiates. In this review, we focus on opioid-induced constipation (OIC), which is often underrecognized and undertreated in the elderly. When opioid therapy is initiated, healthcare providers are encouraged to evaluate risk factors for the development of constipation as part of a thorough patient history. To this end, the patient assessment should include the use of validated instruments, such as the Bristol Stool Scale and Bowel Function Index, to confirm the diagnosis and provide a basis for evaluating treatment outcomes. Healthcare providers should use a stepwise approach to the treatment of OIC in the elderly. Conventional laxatives are a first-line option and considered well tolerated with short-term use as needed; however, evidence is lacking to support their effectiveness in OIC. Moreover, because of the risk of adverse events and other considerations, such as chewing difficulties and swallowing disorders, conventional oral laxatives may be inappropriate for the treatment of OIC in the elderly. Thus, the availability of new pharmacologic agents such as the peripherally acting µ-opioid receptor antagonists methylnaltrexone and naloxegol, which target the underlying causes of OIC, and the secretagogue lubiprostone may provide more effective treatment options for elderly patients with OIC.
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Affiliation(s)
- Sita Chokhavatia
- Division of Gastroenterology and Hepatology, Rutgers, Robert Wood Johnson Medical School, 1 Robert Wood Johnson Place, MEB Room 478C, New Brunswick, NJ, 08901, USA.
- Internal Medicine, Robert Wood Johnson University Hospital, New Brunswick, NJ, USA.
| | - Elizabeth S John
- Division of Gastroenterology and Hepatology, Rutgers, Robert Wood Johnson Medical School, 1 Robert Wood Johnson Place, MEB Room 478C, New Brunswick, NJ, 08901, USA
- Internal Medicine, Robert Wood Johnson University Hospital, New Brunswick, NJ, USA
| | - Mary Barna Bridgeman
- Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Internal Medicine, Robert Wood Johnson University Hospital, New Brunswick, NJ, USA
| | - Deepali Dixit
- Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Critical Care, Robert Wood Johnson University Hospital, New Brunswick, NJ, USA
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88
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Yoshimoto T, Tomiyasu S, Saeki T, Tamaki T, Hashizume T, Murakami M, Matoba M. How Do Hospital Palliative Care Teams Use the WHO Guidelines to Manage Unrelieved Cancer Pain? A 1-Year, Multicenter Audit in Japan. Am J Hosp Palliat Care 2016; 34:92-99. [DOI: 10.1177/1049909115608810] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
It has been reported that pain relief for patients with cancer is suboptimal in Japan. This has been mainly attributed to inadequate dissemination of the World Health Organization (WHO) guidelines for cancer pain management. To better understand this problem, we reviewed how 6 hospital palliative care teams (HPCTs) used the WHO guidelines for unrelieved pain in a 1-year audit that included 534 patients. The HPCT interventions were classified according to the contents of the WHO guidelines. In our study, HPCT interventions involved opioid prescriptions in >80% of referred patients, and “For the Individual” and “Attention to Detail” were the 2 most important principles. Our study indicates which parts of the WHO guidelines should be most heavily emphasized, when disseminating them in Japan.
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Affiliation(s)
| | - Shiro Tomiyasu
- Department of Anesthesia and Palliative Care, Nishida Hospital, Saga, Japan
| | - Toshinari Saeki
- Department of Palliative Care Medicine, Municipal Miyoshi Central Hospital, Hiroshima, Japan
| | - Tomohiro Tamaki
- Department of Palliative Care, Cancer Center, Hokkaido University Hospital, Hokkaido, Japan
| | | | - Masahiko Murakami
- Department of Palliative Care Medicine, Iwate Prefectural Ofunato Hospital, Iwate, Japan
| | - Motohiro Matoba
- Department of Palliative Care Medicine, Japanese Red Cross Medical Center, Tokyo, Japan
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89
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Olesen SS, Poulsen JL, Broberg MCH, Madzak A, Drewes AM. Opioid treatment and hypoalbuminemia are associated with increased hospitalisation rates in chronic pancreatitis outpatients. Pancreatology 2016; 16:807-13. [PMID: 27320721 DOI: 10.1016/j.pan.2016.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 06/05/2016] [Accepted: 06/07/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND/OBJECTIVES Chronic pancreatitis (CP) is a complex and debilitating disease with high resource utilisation. Prospective data on hospital admission rates and associated risk factors are scarce. We investigated hospitalisation rates, causes of hospitalisations and associated risk factors in CP outpatients. METHODS This was a prospective cohort study comprising 170 patients with CP. The primary outcome was time to first pancreatitis related hospitalisation and secondary outcomes were the annual hospitalisation frequency (hospitalisation burden) and causes of hospitalisations. A number of clinical and demographic parameters, including pain pattern and severity, opioid use and parameters related to the nutritional state, were analysed for their association with hospitalisation rates. RESULTS Of the 170 patients, 57 (33.5%) were hospitalised during the follow-up period (median 11.4 months [IQR 3.8-26.4]). The cumulative hospitalisation incidence was 7.6% (95% CI; 4.5-12.2) after 30 days and 28.8% (95% CI; 22.2-35.7) after 1 year. Eighteen of the hospitalised patients (32%) had three or more admissions per year. High dose opioid treatment (>100 mg per day) (Hazard Ratio 3.1 [95% CI; 1.1-8.5]; P = 0.03) and hypoalbuminemia (<36 g/l) (Hazard Ratio 3.8 [95% CI; 2.0-7.8]; P < 0.001) were identified as independent risk factors for hospitalisation. The most frequent causes of hospitalisations were pain exacerbation (40%) and common bile duct stenosis (28%). CONCLUSIONS One-third of CP outpatients account for the majority of hospital admissions and associated risk factors are high dose opioid treatment and hypoalbuminemia. This information should be implemented in outpatient monitoring strategies to identify risk patients and improve treatment.
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Affiliation(s)
- Søren S Olesen
- Centre for Pancreatic Diseases, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.
| | - Jakob Lykke Poulsen
- Centre for Pancreatic Diseases, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Marie C H Broberg
- Centre for Pancreatic Diseases, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Adnan Madzak
- Centre for Pancreatic Diseases, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Radiology, Aalborg University Hospital, Aalborg, Denmark
| | - Asbjørn M Drewes
- Centre for Pancreatic Diseases, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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90
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Olesen AE, Farmer AD, Olesen SS, Aziz Q, Drewes AM. Management of chronic visceral pain. Pain Manag 2016; 6:469-86. [PMID: 27256577 DOI: 10.2217/pmt-2015-0011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Despite marked differences in underlying pathophysiology, the current management of visceral pain largely follows the guidelines derived from the somatic pain literature. The effective management of patients with chronic visceral pain should be multifaceted, including both pharmacological and psychological interventions, thereby providing a mechanism-orientated approach to treatment. Patients can frequently become disenfranchised, and subsequently disengaged, with healthcare providers leading to repeated consultations. Thus, a key aspect of management is to break this cycle by validating patients' symptoms, adopting an empathic approach and taking time to educate patients. To optimize treatment and outcomes in chronic visceral pain we need to move away from approaches exclusively based on dealing with peripheral nociceptive input toward more holistic strategies, taking into account alterations in central pain processing.
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Affiliation(s)
- Anne E Olesen
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Drug Design & Pharmacology, Faculty of Health & Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Adam D Farmer
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,University Hospitals of North Midlands, Stoke on Trent, UK
| | - Søren S Olesen
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Qasim Aziz
- University Hospitals of North Midlands, Stoke on Trent, UK
| | - Asbjørn M Drewes
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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91
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Opioid-induced bowel dysfunction in healthy volunteers assessed with questionnaires and MRI. Eur J Gastroenterol Hepatol 2016; 28:514-24. [PMID: 26795566 DOI: 10.1097/meg.0000000000000574] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Opioid treatment is associated with numerous gastrointestinal adverse effects collectively known as opioid-induced bowel dysfunction (OIBD). Most current knowledge of the pathophysiology derives from animal studies limited by species differences and clinical studies, which have substantial confounders that make evaluation difficult. An experimental model of OIBD in healthy volunteers in a controlled setting is therefore highly warranted. The aim of this study was to assess bowel function in healthy volunteers during opioid treatment using subjective and objective methods. METHODS Twenty-five healthy men were assigned randomly to oxycodone or placebo for 5 days in a cross-over design. The analgesic effect was assessed with muscle pressure algometry and adverse effects were measured using questionnaires including the bowel function index, gastrointestinal symptom rating scale, patient assessment of constipation symptoms and the Bristol stool form scale. Colorectal volumes were determined using a newly developed MRI method. RESULTS Compared with baseline, oxycodone increased pain detection thresholds by 8% (P=0.02). Subjective OIBD was observed as increased bowel function index (464% increase; P<0.001), gastrointestinal symptom rating scale (37% increase; P<0.001) and patient assessment of constipation symptoms (198% increase; P<0.001). Objectively, stools were harder and drier during oxycodone treatment (P<0.001) and segmental colorectal volumes increased in the caecum/ascending colon by 41% (P=0.005) and in the transverse colon by 20% (P=0.005). No associations were detected between questionnaire scores and colorectal volumes. CONCLUSION Experimental OIBD in healthy volunteers was induced during oxycodone treatment. This model has potential for future interventional studies to discriminate the efficacies of different laxatives, peripheral morphine antagonists and opioid treatments.
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92
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Poulsen JL, Nilsson M, Brock C, Sandberg TH, Krogh K, Drewes AM. The Impact of Opioid Treatment on Regional Gastrointestinal Transit. J Neurogastroenterol Motil 2016; 22:282-91. [PMID: 26811503 PMCID: PMC4819867 DOI: 10.5056/jnm15175] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 12/22/2015] [Accepted: 12/31/2015] [Indexed: 12/28/2022] Open
Abstract
Background/Aims To employ an experimental model of opioid-induced bowel dysfunction in healthy human volunteers, and evaluate the impact of opioid treatment compared to placebo on gastrointestinal (GI) symptoms and motility assessed by questionnaires and regional GI transit times using the 3-dimensional (3D)-Transit system. Methods Twenty-five healthy males were randomly assigned to oxycodone or placebo for 5 days in a double blind, crossover design. Adverse GI effects were measured with the bowel function index, gastrointestinal symptom rating scale, patient assessment of constipation symptom questionnaire, and Bristol stool form scale. Regional GI transit times were determined using the 3D-Transit system, and segmental transit times in the colon were determined using a custom Matlab® graphical user interface. Results GI symptom scores increased significantly across all applied GI questionnaires during opioid treatment. Oxycodone increased median total GI transit time from 22.2 to 43.9 hours (P < 0.001), segmental transit times in the cecum and ascending colon from 5.7 to 9.9 hours (P = 0.012), rectosigmoid colon transit from 2.7 to 9.0 hours (P = 0.044), and colorectal transit time from 18.6 to 38.6 hours (P = 0.001). No associations between questionnaire scores and segmental transit times were detected. Conclusions Self-assessed GI adverse effects and increased GI transit times in different segments were induced during oxycodone treatment. This detailed information about segmental changes in motility has great potential for future interventional head-to-head trials of different laxative regimes for prevention and treatment of constipation.
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Affiliation(s)
- Jakob L Poulsen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Matias Nilsson
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Christina Brock
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Thomas H Sandberg
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Klaus Krogh
- Neurogastroenterology Unit, Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
| | - Asbjørn M Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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Drewes AM, Munkholm P, Simrén M, Breivik H, Kongsgaard UE, Hatlebakk JG, Agreus L, Friedrichsen M, Christrup LL. Definition, diagnosis and treatment strategies for opioid-induced bowel dysfunction–Recommendations of the Nordic Working Group. Scand J Pain 2016; 11:111-122. [DOI: 10.1016/j.sjpain.2015.12.005] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 12/12/2015] [Indexed: 02/07/2023]
Abstract
Abstract
Background and aims
Opioid-induced bowel dysfunction (OIBD) is an increasing problem due to the common use of opioids for pain worldwide. It manifests with different symptoms, such as dry mouth, gastro-oesophageal reflux, vomiting, bloating, abdominal pain, anorexia, hard stools, constipation and incomplete evacuation. Opioid-induced constipation (OIC) is one of its many symptoms and probably the most prevalent. The current review describes the pathophysiology, clinical implications and treatment of OIBD.
Methods
The Nordic Working Group was formed to provide input for Scandinavian specialists in multiple, relevant areas. Seven main topics with associated statements were defined. The working plan provided a structured format for systematic reviews and included instructions on how to evaluate the level of evidence according to the GRADE guidelines. The quality of evidence supporting the different statements was rated as high, moderate or low. At a second meeting, the group discussed and voted on each section with recommendations (weak and strong) for the statements.
Results
The literature review supported the fact that opioid receptors are expressed throughout the gastrointestinal tract. When blocked by exogenous opioids, there are changes in motility, secretion and absorption of fluids, and sphincter function that are reflected in clinical symptoms. The group supported a recent consensus statement for OIC, which takes into account the change in bowel habits for at least one week rather than focusing on the frequency of bowel movements. Many patients with pain receive opioid therapy and concomitant constipation is associated with increased morbidity and utilization of healthcare resources. Opioid treatment for acute postoperative pain will prolong the postoperative ileus and should also be considered in this context. There are no available tools to assess OIBD, but many rating scales have been developed to assess constipation, and a few specifically address OIC. A clinical treatment strategy for OIBD/OIC was proposed and presented in a flowchart. First-line treatment of OIC is conventional laxatives, lifestyle changes, tapering the opioid dosage and alternative analgesics. Whilst opioid rotation may also improve symptoms, these remain unalleviated in a substantial proportion of patients. Should conventional treatment fail, mechanism-based treatment with opioid antagonists should be considered, and they show advantages over laxatives. It should not be overlooked that many reasons for constipation other than OIBD exist, which should be taken into consideration in the individual patient.
Conclusion and implications
It is the belief of this Nordic Working Group that increased awareness of adverse effects and OIBD, particularly OIC, will lead to better pain treatment in patients on opioid therapy. Subsequently, optimised therapy will improve quality of life and, from a socio-economic perspective, may also reduce costs associated with hospitalisation, sick leave and early retirement in these patients.
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Affiliation(s)
- Asbjørn M. Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology , Aalborg University Hospital , Hobrovej Denmark
| | - Pia Munkholm
- NOH (Nordsjællands Hospital) Gastroenterology , Hillerød Denmark
| | - Magnus Simrén
- Department of Internal Medicine & Clinical Nutrition , Institute of Medicine, Sahlgrenska Academy, University of Gothenburg , Göteborg Sweden
| | - Harald Breivik
- Department of Pain Management and Research , Oslo University Hospital and University of Oslo , Rikshospitalet Norway
| | - Ulf E. Kongsgaard
- Department of Anaesthesiology, Division of Emergencies and Critical Care , Oslo University Hospital, Norway and Medical Faculty, University of Oslo , Rikshospitalet Norway
| | - Jan G. Hatlebakk
- Department of Clinical Medicine , Haukeland University Hospital , Bergen , Norway
| | - Lars Agreus
- Division of Family Medicine , Karolinska Institute , Stockholm , Sweden
| | - Maria Friedrichsen
- Department of Social and Welfare Studies , Faculty of Medicine and Health Sciences , Norrköping , Sweden
| | - Lona L. Christrup
- Department of Drug Design and Pharmacology , Faculty of Health Sciences, University of Copenhagen , københavn Denmark
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Siemens W, Becker G. Methylnaltrexone for opioid-induced constipation: review and meta-analyses for objective plus subjective efficacy and safety outcomes. Ther Clin Risk Manag 2016; 12:401-12. [PMID: 27042082 PMCID: PMC4795449 DOI: 10.2147/tcrm.s80749] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Introduction Opioid-induced constipation (OIC) is a frequent adverse event that impairs patients’ quality of life. This article evaluates the objective plus subjective efficacy and the safety of methylnaltrexone (MNTX) in OIC patients. Methods Randomized controlled trials from a recent systematic review were included. In addition, a PubMed search was conducted for January 2014 to December 21, 2015. We included randomized controlled trials with adult OIC patients, MNTX as study drug, and OIC as primary outcome. Results were categorized in three outcome types: objective outcome measures (eg, time to laxation), patient-reported outcomes (eg, straining), and global burden measures (eg, constipation distress). Dichotomous meta-analyses with risk ratios (RRs) and 95% confidence intervals (CIs) were calculated using RevMan 5.3. Only comparisons between MNTX and placebo were made. Results We included seven studies with 1,860 patients. A meta-analysis revealed that patients under MNTX had considerably more rescue-free bowel movement within 4 hours after the first dose (RR 3.74, 95% CI 2.87 to 4.86; five studies, n=938; I2=0). Results of the review indicated that patients under MNTX had a higher stool frequency and needed less time to laxation compared with placebo. Moreover, patients receiving MNTX tended to have better values in patient-reported outcomes and global burden measures. Meta-analyses on safety revealed that patients under MNTX experienced more abdominal pain (RR 2.38, 95% CI 1.75 to 3.23; six studies, n=1,412; I2=60%) but showed a nonsignificant tendency in nausea (RR 1.27, 95% CI 0.90 to 1.78; six studies, n=1,412; I2=12%) and diarrhea (RR 1.45, 95% CI 0.94 to 2.24; five studies, n=1,258; I2=45%). The incidence of MNTX-related serious adverse events was 0.2% (4/1,860). Conclusion MNTX has been shown to be effective and safe. Future randomized controlled trials should consequently incorporate objective outcome measures, patient-reported outcomes, and global burden measures, and research the efficacy of MNTX in other populations, for example, patients under opioids after surgical procedures.
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Affiliation(s)
- Waldemar Siemens
- Clinic for Palliative Care, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Gerhild Becker
- Clinic for Palliative Care, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Abstract
OBJECTIVES The authors investigated if timing of medical treatment is associated with the analgesic effect of pregabalin or placebo in patients with chronic pancreatitis (CP). METHODS Sixty-four patients received pregabalin (150-300 mg twice a day) or matching placebo for 3 consecutive weeks. Responders to treatment were defined as patients with a reduction in clinical pain scores of 30% or greater. Factors associated with timing of pain treatment (ie, duration of CP and opioid usage) were collected at baseline. In addition, other factors that potentially could influence outcome (eg, clinical pain scores prior to study medication, diabetes, and exocrine pancreatic insufficiency) were also included. Conventional groupwise logistic regression and analysis on the individual patient level with a machine learning technique were used to predict treatment response. RESULTS In the conventional statistical analysis duration of CP (odds ratio, 0.9; 95% confidence interval, 0.8-1.1; P = 0.3) and opioid treatment (odds ratio, 1.0; 95% confidence interval, 0.9-1.1; P = 0.6) were not associated with pain relief. In addition, none of the supplementary factors were associated with treatment response (all P > 0.1). Likewise, in the individual patient-level analysis, none of the included variables reached classification accuracies greater than chance level (all P > 0.1). CONCLUSIONS Pregabalin can be added as adjuvant analgesic at any time point during the disease course of CP.
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Abstract
PURPOSE OF REVIEW Opioid-based management of noncancer pain has become much more prevalent over the last 2 decades and is responsible for a wide range of side-effects, particularly affecting the intestinal tract causing opioid-induced constipation (OIC). This review will consider results of recent clinical trials that have provided evidence of new pharmacological management options for the treatment of OIC. RECENT FINDINGS Supportive use of conventional agents, such as stool softeners, osmotic laxatives, and stimulating laxatives in OIC has limited efficacy. The peripheral μ-opioid receptor antagonist (PAMORA) methylnaltrexone (MNTX) was first FDA approved for OIC in patients with advanced illness and later also for OIC in noncancer pain patients; clinical trial results indicated MNTX did not reverse opioid analgesia and did not trigger central opioid withdrawal. Another PAMORA, the orally available naloxegol, has also gained recent FDA approval for the treatment of OIC in adults with chronic, noncancer pain. Lubiprostone, a bicyclical fatty acid acting via activation of intestinal chloride channel-2 (ClC-2), was also approved for OIC treatment in patients with noncancer pain. SUMMARY PAMORA MNTX and naloxegol and the intestinal chloride channel-2 (ClC-2) activator lubiprostone represent additional possible therapeutic options for the management of OIC in patients with chronic noncancer pain.
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Affiliation(s)
- H Christian Weber
- Section of Gastroenterology, Boston University School of Medicine, Boston, Massachusetts, USA
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97
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Rumman A, Gallinger ZR, Liu LWC. Opioid induced constipation in cancer patients: pathophysiology, diagnosis and treatment. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/23809000.2016.1131595] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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98
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Abstract
Oral naloxegol (Movantik™, Moventig(®)), a peripherally acting μ-opioid receptor antagonist, inhibits opioid binding in μ-opioid receptors in the gastrointestinal tract. This article reviews the pharmacological properties of naloxegol and its clinical efficacy and tolerability in patients with opioid-induced constipation. It demonstrated clinical efficacy and was well tolerated in placebo-controlled trials in patients with non-cancer pain and opioid-induced constipation, including those with an inadequate response to laxatives, and was well tolerated in a long-term safety study. As a PEGylated naloxone derivative, naloxegol is associated with significant improvements in spontaneous bowel movements, while maintaining levels of opioid-related analgesia (a result of its reduced ability to cross the blood-brain barrier). Naloxegol is a useful option in the treatment of opioid-induced constipation.
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99
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Tack J, Lappalainen J, Diva U, Tummala R, Sostek M. Efficacy and safety of naloxegol in patients with opioid-induced constipation and laxative-inadequate response. United European Gastroenterol J 2015; 3:471-80. [PMID: 26535126 DOI: 10.1177/2050640615604543] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Treatment options for patients with opioid-induced constipation (OIC) and inadequate response to laxatives (LIR) are few. OBJECTIVE Assess the efficacy and safety of orally administered naloxegol in patients with prospectively confirmed OIC and LIR. METHODS We analyzed pooled data from two identical randomized, double-blind, placebo-controlled, Phase 3 trials of naloxegol in patients with non-cancer pain, OIC and LIR in which naloxegol (12.5 mg, n = 240; 25 mg, n = 241) or placebo (n = 239) were administered daily. We assessed the response rates, time to first post-dose laxation, spontaneous bowel movements (SBMs), OIC symptoms and patient-reported outcomes over 12 weeks. RESULTS OIC response rates for the naloxegol 25-mg (p < 0.001) and the 12.5-mg (p = 0.005) LIR dose groups were higher than placebo. Median times to first post-dose SBM were 7.6, 19.2 and 41.1 hours for the naloxegol 25 mg, naloxegol 12.5 mg and placebo groups, respectively. Other SBM measures, daily symptoms of OIC, and both the Patient Assessment of Constipation - Symptoms and Patient Assessment of Constipation-Quality of Life scores improved from baseline with naloxegol treatment. Changes from baseline in opioid dose, pain scores and opioid withdrawal scores were similar among treatment groups. CONCLUSIONS Naloxegol was efficacious, generally safe and well tolerated in the patients with OIC and LIR, while preserving opioid analgesia. ClinicalTrials.gov identifiers: NCT01309841; NCT01323790.
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Affiliation(s)
- Jan Tack
- Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven, Belgium
| | - Jaakko Lappalainen
- AstraZeneca Pharmaceuticals LP, Wilmington, DE, USA; currently at University of Pennsylvania, Philadelphia, PA, USA
| | - Ulysses Diva
- AstraZeneca Pharmaceuticals LP, Gaithersburg, MD, USA
| | - Raj Tummala
- AstraZeneca Pharmaceuticals LP, Gaithersburg, MD, USA
| | - Mark Sostek
- AstraZeneca Pharmaceuticals LP, Gaithersburg, MD, USA
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Poulsen JL, Brock C, Olesen AE, Nilsson M, Drewes AM. Evolving paradigms in the treatment of opioid-induced bowel dysfunction. Therap Adv Gastroenterol 2015; 8:360-72. [PMID: 26557892 PMCID: PMC4622283 DOI: 10.1177/1756283x15589526] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In recent years prescription of opioids has increased significantly. Although effective in pain management, bothersome gastrointestinal adverse effects are experienced by a substantial proportion of opioid-treated patients. This can lead to difficulties with therapy and subsequently inadequate pain relief. Collectively referred to as opioid-induced bowel dysfunction, these adverse effects are the result of binding of exogenous opioids to opioid receptors in the gastrointestinal tract. This leads to disturbance of three important gastrointestinal functions: motility, coordination of sphincter function and secretion. In the clinic this manifests in a wide range of symptoms such as reflux, bloating, abdominal cramping, hard, dry stools, and incomplete evacuation, although the most known adverse effect is opioid-induced constipation. Traditional treatment with laxatives is often insufficient, but in recent years a number of novel pharmacological approaches have been introduced. In this review the pathophysiology, symptomatology and prevalence of opioid-induced bowel dysfunction is presented along with the benefits and caveats of a suggested consensus definition for opioid-induced constipation. Finally, traditional treatment is appraised and compared with the latest pharmacological developments. In conclusion, opioid antagonists restricted to the periphery show promising results, but use of different definitions and outcome measures complicate comparison. However, an international working group has recently suggested a consensus definition for opioid-induced constipation and relevant outcome measures have also been proposed. If investigators within this field adapt the suggested consensus and include symptoms related to dysfunction of the upper gut, it will ease comparison and be a step forward in future research.
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Affiliation(s)
- Jakob Lykke Poulsen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Christina Brock
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Anne Estrup Olesen
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark
| | - Matias Nilsson
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark
| | - Asbjørn Mohr Drewes
- Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Mølleparkvej 4, DK-9000 Aalborg, Denmark
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