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van den Haak DAC, Otten L, Koenen HJPM, Smeets RL, Piet B, Pickkers P, Kox M, ter Heine R. Evidence‐based rationale for low dose nivolumab in critically ill patients with sepsis‐induced immunosuppression. Clin Transl Sci 2023. [DOI: 10.1111/cts.13503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/28/2023] [Accepted: 02/17/2023] [Indexed: 04/03/2023] Open
Affiliation(s)
- Demy A. C. van den Haak
- Department of Pharmacy and Research Institute for Medical Innovation Radboud University Medical Center Nijmegen The Netherlands
| | - Leila‐Sophie Otten
- Department of Pharmacy and Research Institute for Medical Innovation Radboud University Medical Center Nijmegen The Netherlands
| | - Hans J. P. M. Koenen
- Laboratory Medicine, Laboratory for Medical Immunology Radboud University Medical Center Nijmegen The Netherlands
| | - Ruben L. Smeets
- Laboratory Medicine, Laboratory for Medical Immunology Radboud University Medical Center Nijmegen The Netherlands
| | - Berber Piet
- Department of Pulmonology Radboud University Medical Center Nijmegen The Netherlands
| | - Peter Pickkers
- Department of Intensive Care and Radboud Center for Infectious Diseases (RCI) Radboud University Nijmegen Medical Centre Nijmegen The Netherlands
| | - Matthijs Kox
- Department of Intensive Care and Radboud Center for Infectious Diseases (RCI) Radboud University Nijmegen Medical Centre Nijmegen The Netherlands
| | - Rob ter Heine
- Department of Pharmacy and Research Institute for Medical Innovation Radboud University Medical Center Nijmegen The Netherlands
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Clinical Experience, Characteristics, and Performance of an Acetaminophen Absorption Test in Critically Ill Patients. Am J Ther 2023; 30:e95-e102. [PMID: 34387562 DOI: 10.1097/mjt.0000000000001436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Altered drug and nutrient absorption presents a unique challenge in critically ill patients. Performing an acetaminophen absorption test (AAT) has been used as a marker for gastric motility and upper small bowel absorption; thus, it may provide objective data regarding enteral absorptive ability in critically ill patients. STUDY QUESTION What is the clinical experience with AAT when used as a surrogate marker for enteral absorption in critically ill patients? STUDY DESIGN This single-center, retrospective, cohort study evaluated serum acetaminophen concentrations within 180 minutes following 1-time enteral administration of an AAT. Patients admitted to the surgical and medical intensive care units and medical intensive care units over a 7-year period were evaluated. Groups were defined as positive (acetaminophen concentration of ≥10 mg/L) or negative (acetaminophen concentration of <10 mg/L) AAT. MEASURES AND OUTCOMES The outcomes were to describe the clinical experience, characteristics, and performance of AAT. RESULTS Forty-eight patients were included. Patients were 58.5 ± 14 years of age, mostly male (58.3%), and admitted to the surgical intensive care unit (66.7%). Median hospital length of stay was 47.5 (27-78.8) days. Thirty-four patients (70.8%) had a positive AAT [median concentration, 14 (12-18) mg/L]. Median time to first detectable concentration was 37 (33-64) minutes. AAT characteristics were similar between the groups including total dose, weight-based dose, time to first and second assays, drug formulation, and site of administration between groups. There were no independent risk factors identified on regression analysis for negative AAT. CONCLUSIONS An acetaminophen dose of 15 mg/kg with 2 coordinated serum concentrations approximately 30 and 60 minutes after administration is a reasonable construct for AAT. Future research is needed to assess AAT utility, safety, and clinical outcomes for predicting patient ability to absorb enteral feeds and medications.
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Low and Highly Variable Exposure to Prophylactic LMWH Nadroparin in Critically Ill Patients: Back to the Drawing Board for Prophylactic Dosing? Clin Pharmacokinet 2023; 62:297-305. [PMID: 36581732 PMCID: PMC9800240 DOI: 10.1007/s40262-022-01202-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2022] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND OBJECTIVE Low-molecular-weight heparins are routinely administered to patients in the intensive care unit to prevent venous thromboembolisms. There is considerable evidence that low-molecular-weight heparin doses should be personalised based on anti-Xa levels, but pharmacokinetic data in intensive care unit patients are lacking. This study aimed to characterise the pharmacokinetics and associated variability of the low-molecular-weight heparin nadroparin in critically ill patients. METHODS Critically ill adult patients who were admitted to the intensive care unit and received nadroparin for prophylaxis of venous thromboembolism were included in a study. Population pharmacokinetic analysis was performed by means of parametric non-linear mixed-effects modelling (NONMEM). RESULTS A total of 30 patients were enrolled with 12 patients undergoing continuous veno-venous hemodialysis and 18 patients not undergoing continuous veno-venous hemodialysis. Very high variability in pharmacokinetics was observed with an inter-individual variability in the volume of distribution of 63.7% (95% confidence interval 46.5-90.6), clearance of 166% (95% confidence interval 84.7-280) and relative bioavailability of 40.2% (95% confidence interval 29.5-52.6). We found that standard doses of 2850 IE and 5700 IE of nadroparin resulted in sub-prophylactic exposure in critically ill patients. CONCLUSIONS Low exposure and highly variable pharmacokinetics of nadroparin were observed in intensive care unit patients treated with a prophylactic dose. It can be debated whether nadroparin is currently dosed optimally in intensive care unit patients and our findings encourage the investigation of higher and tailored dosing of nadroparin in the critically ill.
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Morales Castro D, Dresser L, Granton J, Fan E. Pharmacokinetic Alterations Associated with Critical Illness. Clin Pharmacokinet 2023; 62:209-220. [PMID: 36732476 PMCID: PMC9894673 DOI: 10.1007/s40262-023-01213-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2023] [Indexed: 02/04/2023]
Abstract
Haemodynamic, metabolic, and biochemical derangements in critically ill patients affect drug pharmacokinetics and pharmacodynamics making dose optimisation particularly challenging. Appropriate therapeutic dosing depends on the knowledge of the physiologic changes caused by the patient's comorbidities, underlying disease, resuscitation strategies, and polypharmacy. Critical illness will result in altered drug protein binding, ionisation, and volume of distribution; it will also decrease oral drug absorption, intestinal and hepatic metabolism, and renal clearance. In contrast, the resuscitation strategies and the use of vasoactive drugs may oppose these effects by leading to a hyperdynamic state that will increase blood flow towards the major organs including the brain, heart, kidneys, and liver, with the subsequent increase of drug hepatic metabolism and renal excretion. Metabolism is the main mechanism for drug clearance and is one of the main pharmacokinetic processes affected; it is influenced by patient-specific factors, such as comorbidities and genetics; therapeutic-specific factors, including drug characteristics and interactions; and disease-specific factors, like organ dysfunction. Moreover, organ support such as mechanical ventilation, renal replacement therapy, and extracorporeal membrane oxygenation may contribute to both inter- and intra-patient variability of drug pharmacokinetics. The combination of these competing factors makes it difficult to predict drug response in critically ill patients. Pharmacotherapy targeted to therapeutic goals and therapeutic drug monitoring is currently the best option for the safe care of the critically ill. The aim of this paper is to review the alterations in drug pharmacokinetics associated with critical illness and to summarise the available evidence.
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Affiliation(s)
- Diana Morales Castro
- Interdepartmental Division of Critical Care Medicine, Toronto General Hospital, University of Toronto, 585 University Avenue, 9-MaRS, Toronto, ON, M5G 2N2, Canada. .,Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada.
| | - Linda Dresser
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada
| | - John Granton
- Interdepartmental Division of Critical Care Medicine, Toronto General Hospital, University of Toronto, 585 University Avenue, 9-MaRS, Toronto, ON, M5G 2N2, Canada.,Department of Medicine, Toronto General Hospital, University of Toronto, Toronto, ON, Canada
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine, Toronto General Hospital, University of Toronto, 585 University Avenue, 9-MaRS, Toronto, ON, M5G 2N2, Canada.,Department of Medicine, Toronto General Hospital, University of Toronto, Toronto, ON, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
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5
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Chamorro-Garcia A, Gerson J, Flatebo C, Fetter L, Downs AM, Emmons N, Ennis HL, Milosavić N, Yang K, Stojanovic M, Ricci F, Kippin TE, Plaxco KW. Real-Time, Seconds-Resolved Measurements of Plasma Methotrexate In Situ in the Living Body. ACS Sens 2023; 8:150-157. [PMID: 36534756 DOI: 10.1021/acssensors.2c01894] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Dose-limiting toxicity and significant patient-to-patient pharmacokinetic variability often render it difficult to achieve the safe and effective dosing of drugs. This is further compounded by the slow, cumbersome nature of the analytical methods used to monitor patient-specific pharmacokinetics, which inevitably rely on blood draws followed by post-facto laboratory analysis. Motivated by the pressing need for improved "therapeutic drug monitoring", we are developing electrochemical aptamer-based (EAB) sensors, a minimally invasive biosensor architecture that can provide real-time, seconds-resolved measurements of drug levels in situ in the living body. A key advantage of EAB sensors is that they are generalizable to the detection of a wide range of therapeutic agents because they are independent of the chemical or enzymatic reactivity of their targets. Three of the four therapeutic drug classes that have, to date, been shown measurable using in vivo EAB sensors, however, bind to nucleic acids as part of their mode of action, leaving open questions regarding the extent to which the approach can be generalized to therapeutics that do not. Here, we demonstrate real-time, in vivo measurements of plasma methotrexate, an antimetabolite (a mode of action not reliant on DNA binding) chemotherapeutic, following human-relevant dosing in a live rat animal model. By providing hundreds of drug concentration values, the resulting seconds-resolved measurements succeed in defining key pharmacokinetic parameters, including the drug's elimination rate, peak plasma concentration, and exposure (area under the curve), with unprecedented 5 to 10% precision. With this level of precision, we easily identify significant (>2-fold) differences in drug exposure occurring between even healthy rats given the same mass-adjusted methotrexate dose. By providing a real-time, seconds-resolved window into methotrexate pharmacokinetics, such measurements can be used to precisely "individualize" the dosing of this significantly toxic yet vitally important chemotherapeutic.
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Affiliation(s)
- Alejandro Chamorro-Garcia
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States.,Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Julian Gerson
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Charlotte Flatebo
- Institute for Collaborative Biotechnologies, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Lisa Fetter
- Biomolecular Science and Engineering Program, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Alex M Downs
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Nicole Emmons
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Herbert L Ennis
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University New York, New York, New York 10032, United States
| | - Nenad Milosavić
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University New York, New York, New York 10032, United States
| | - Kyungae Yang
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University New York, New York, New York 10032, United States
| | - Milan Stojanovic
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University New York, New York, New York 10032, United States.,Department of Biomedical Engineering and Systems Biology, Columbia University New York, New York, New York 10032, United States
| | - Francesco Ricci
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Tod E Kippin
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Kevin W Plaxco
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States.,Biomolecular Science and Engineering Program, University of California Santa Barbara, Santa Barbara, California 93106, United States.,Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States.,Biological Engineering Graduate Program, University of California Santa Barbara, Santa Barbara, California 93106, United States
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Pereira JG, Fernandes J, Duarte AR, Fernandes SM. β-Lactam Dosing in Critical Patients: A Narrative Review of Optimal Efficacy and the Prevention of Resistance and Toxicity. Antibiotics (Basel) 2022; 11:antibiotics11121839. [PMID: 36551496 PMCID: PMC9774837 DOI: 10.3390/antibiotics11121839] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Antimicrobial prescription in critically ill patients represents a complex challenge due to the difficult balance between infection treatment and toxicity prevention. Underexposure to antibiotics and therapeutic failure or, conversely, drug overexposure and toxicity may both contribute to a worse prognosis. Moreover, changes in organ perfusion and dysfunction often lead to unpredictable pharmacokinetics. In critically ill patients, interindividual and intraindividual real-time β-lactam antibiotic dose adjustments according to the patient's condition are critical. The continuous infusion of β-lactams and the therapeutic monitoring of their concentration have both been proposed to improve their efficacy, but strong data to support their use are still lacking. The knowledge of the pharmacokinetic/pharmacodynamic targets is poor and is mostly based on observational data. In patients with renal or hepatic failure, selecting the right dose is even more tricky due to changes in drug clearance, distribution, and the use of extracorporeal circuits. Intermittent usage may further increase the dosing conundrum. Recent data have emerged linking overexposure to β-lactams to central nervous system toxicity, mitochondrial recovery delay, and microbiome changes. In addition, it is well recognized that β-lactam exposure facilitates resistance selection and that correct dosing can help to overcome it. In this review, we discuss recent data regarding real-time β-lactam antibiotic dose adjustment, options in special populations, and the impacts on mitochondria and the microbiome.
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Affiliation(s)
- João Gonçalves Pereira
- Hospital Vila Franca de Xira, 2600-009 Vila Franca de Xira, Portugal
- Grupo de Investigação e Desenvolvimento em Infeção e Sépsis, 4450-681 Matosinhos, Portugal
- Correspondence: ; Tel.: +351-96-244-1546
| | - Joana Fernandes
- Centro Hospitalar de Trás-os-Montes e Alto Douro, 5000-508 Vila Real, Portugal
| | - Ana Rita Duarte
- Nova Medical School, Universidade NOVA de Lisboa, 1099-085 Lisbon, Portugal
| | - Susana Mendes Fernandes
- Grupo de Investigação e Desenvolvimento em Infeção e Sépsis, 4450-681 Matosinhos, Portugal
- Clínica Universitária de Medicina Intensiva, Faculdade de Medicina, Universidade de Lisboa, 1649-004 Lisboa, Portugal
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Dendy JM, Hughes SG, Soslow JH, Clark DE, Paschal CB, Gore JC. Myocardial Tissue Oxygenation and Microvascular Blood Volume Measurement Using a Contrast Blood Oxygenation Level-Dependent Imaging Model. Invest Radiol 2022; 57:561-566. [PMID: 35438656 PMCID: PMC9355912 DOI: 10.1097/rli.0000000000000871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES We propose a method of quantitatively measuring drug-induced microvascular volume changes, as well as drug-induced changes in blood oxygenation using calibrated blood oxygen level-dependent magnetic resonance imaging (MRI). We postulate that for MRI signals there is a contribution to R2* relaxation rates from static susceptibility effects of the intravascular blood that scales with the blood volume/magnetic field and depends on the oxygenation state of the blood. These may be compared with the effects of an intravascular contrast agent. With 4 R2* measurements, microvascular blood volume (MBV) and tissue oxygenation changes can be quantified with the administration of a vasoactive drug. MATERIALS AND METHODS The protocol examined 12 healthy rats in a prospective observational study. R2* maps were acquired with and without infusion of adenosine, which increases microvascular blood flow, or dobutamine, which increases myocardial oxygen consumption. In addition, R2* maps were acquired after the intravenous administration of a monocrystalline iron oxide nanoparticle, with and without adenosine or dobutamine. RESULTS Total microvascular volume was shown to increase by 10.8% with adenosine and by 25.6% with dobutamine ( P < 0.05). When comparing endocardium versus epicardium, both adenosine and dobutamine demonstrated significant differences between endocardial and epicardial MBV changes ( P < 0.05). Total myocardial oxygenation saturation increased by 6.59% with adenosine and by 1.64% with dobutamine ( P = 0.27). The difference between epicardial and endocardial oxygenation changes were significant with each drug (adenosine P < 0.05, dobutamine P < 0.05). CONCLUSIONS Our results demonstrate the ability to quantify microvascular volume and oxygenation changes using calibrated blood oxygen level-dependent MRI, and we demonstrate different responses of adenosine and dobutamine. This method has clinical potential in examining microvascular disease in various disease states without the administration of radiopharmaceuticals or gadolinium-based contrast agents.
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Affiliation(s)
- Jeffrey M Dendy
- From the Division of Cardiovascular Medicine, Department of Internal Medicine, Vanderbilt University Medical Center
| | - Sean G Hughes
- From the Division of Cardiovascular Medicine, Department of Internal Medicine, Vanderbilt University Medical Center
| | - Jonathan H Soslow
- Thomas P. Graham Division of Pediatric Cardiology, Department of Pediatrics, Monroe Carell Jr. Children's Hospital at Vanderbilt
| | - Daniel E Clark
- From the Division of Cardiovascular Medicine, Department of Internal Medicine, Vanderbilt University Medical Center
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Retrospective Evaluation of Intravenous Enoxaparin Administration in Feline Arterial Thromboembolism. Animals (Basel) 2022; 12:ani12151977. [PMID: 35953966 PMCID: PMC9367538 DOI: 10.3390/ani12151977] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 07/27/2022] [Accepted: 08/03/2022] [Indexed: 01/05/2023] Open
Abstract
Simple Summary Feline arterial thromboembolism is a painful disease characterized by acute ischemic necrosis of one or more limbs due to cardiac diseases, hyperthyroidism, or neoplasia. Among others, medical treatment consists of preventing new thrombus formation primarily using heparin products, such as enoxaparin. This retrospective study reports clinical data, regain of perfusion, short-term outcome, and complications of 36 affected cats treated with a novel intravenous enoxaparin protocol. Furthermore, we aimed to report monitoring and management of the intravenous enoxaparin treatment for this disease. In our population, visible hemorrhage was rare. The most common causes of death/euthanasia were cardiac instability, acute kidney injury, neurological abnormalities, and limb necrosis. The hospital discharge rate was 47% overall and was significantly different between single limb (83%) and dual limb (29%) thromboembolism. Our study supports the intravenous use of enoxaparin in combination with oral clopidogrel for cats with thromboembolism as an alternative treatment method. Abstract Induction of a hypocoagulable state is imperative in the treatment of feline arterial thromboembolism. Publications in human medicine report the use of enoxaparin intravenously in selected cases. The aim of our retrospective study was to report the regain of perfusion, short-term outcome, and complications of cats treated with a novel intravenous enoxaparin protocol (1 mg/kg bolus injection followed by 3 mg/kg/day continuous infusion) combined with oral clopidogrel administration. The secondary aim was to report the monitoring of enoxaparin with anti-Xa activity. There were 36 cats included. The probability of reaching limb reperfusion was significantly (p = 0.0148) higher with anti-Xa activity within or above the target range compared to results below the target range (19/21, 90% versus 11/20, 55%). The complications observed were acute kidney injury (15/36, 42%), hemorrhage (2/36, 6%), and neurological signs (6/36, 17%). The most common causes of death/euthanasia were cardiac instability, acute kidney injury, neurological abnormalities, and limb necrosis. The hospital discharge rate was 83% (10/12) for single limb and 29% (7/24) for dual limb thrombosis; the difference was significant (p = 0.0039). The median hospitalization time for the survivors was 119.5 (95–480) h. Our study supports the use of intravenous continuous rate infusion of enoxaparin in combination with oral clopidogrel for cats with aortic thromboembolism. We report similar discharge rates and lower hemorrhage rates than previously reported with thrombolytic treatment.
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Forsberg J, Bedard E, Mahmoud SH. Bioavailability of Orally Administered Drugs in Critically Ill Patients. J Pharm Pract 2022:8971900221100205. [PMID: 35521821 DOI: 10.1177/08971900221100205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Critically ill patients managed in the Intensive Care Unit (ICU) suffer from several pathophysiological alterations due to critical illness resulting in potential changes in the pharmacokinetics of drugs including systemic absorption. Nevertheless, these patients are still given some medications in unadjusted doses thereby putting the patients at a risk for therapy failure. The objective for this study was to summarize the available evidence regarding oral drug absorption in the ICU. A literature search of the databases MEDLINE, EMBASE, and PubMed was conducted on (February 24, 2020). Articles discussing the rate and/or extent of orally administered drugs in critically ill patients were included. A total of 58 studies were found: 17 interventional studies, 33 observational studies (30 prospective, 3 retrospective) and 8 case reports. A total of 43 articles reported altered drug absorption in critically ill patients suggesting the need for alternative measures to facilitate treatment success. The absorption of orally administered drugs may be altered in critically ill patients. Measures for altered drug absorption in critically ill patients were suggested such as holding tube feeding before and after medication administration, increasing doses of orally administrated drugs and using alternate routes of administration.
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Affiliation(s)
- Johanna Forsberg
- Division for Pharmacokinetics, Department of Pharmaceutical Biosciences, Faculty of Pharmacy, 8097Uppsala University, Uppsala, Sweden
| | - Emma Bedard
- Faculty of Pharmacy and Pharmaceutical Sciences, 70414University of Alberta, Edmonton, AB, Canada
| | - Sherif H Mahmoud
- Faculty of Pharmacy and Pharmaceutical Sciences, 70414University of Alberta, Edmonton, AB, Canada
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10
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He S, Cheng Z, Xie F. PK/PD guided gentamicin dosing in critically ill patients: a revisit of the Hartford nomogram. Int J Antimicrob Agents 2022; 59:106600. [DOI: 10.1016/j.ijantimicag.2022.106600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/29/2022] [Accepted: 04/28/2022] [Indexed: 11/05/2022]
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Carlson TJ, Gonzales-Luna AJ, Garey KW. Fulminant Clostridioides difficile Infection: A Review of Treatment Options for a Life-Threatening Infection. Semin Respir Crit Care Med 2022; 43:28-38. [PMID: 35172356 DOI: 10.1055/s-0041-1740973] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Fulminant Clostridioides difficile infection (FCDI) encompasses 3 to 5% of all CDI cases with associated mortality rates between 30 and 40%. Major treatment modalities include surgery and medical management with antibiotic and nonantibiotic therapies. However, identification of patients with CDI that will progress to FCDI is difficult and makes it challenging to direct medical management and identify those who may benefit from surgery. Furthermore, since it is difficult to study such a critically ill population, data investigating treatment options are limited. Surgical management with diverting loop ileostomy (LI) instead of a total abdominal colectomy (TAC) with end ileostomy has several appealing advantages, and studies have not consistently demonstrated a clinical benefit with this less-invasive strategy, so both LI and TAC remain acceptable surgical options. Successful medical management of FCDI is complicated by pharmacokinetic changes that occur in critically ill patients, and there is an absence of high-quality studies that included patients with FCDI. Recommendations accordingly include a combination of antibiotics administered via multiple routes to ensure adequate drug concentrations in the colon: intravenous metronidazole, high-dose oral vancomycin, and rectal vancomycin. Although fidaxomicin is now recommended as first-line therapy for non-FCDI, there are limited clinical data to support its use in FCDI. Several nonantibiotic therapies, including fecal microbiota transplantation and intravenous immunoglobulin, have shown success as adjunctive therapies, but they are unlikely to be effective alone. In this review, we aim to summarize diagnosis and treatment options for FCDI.
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Affiliation(s)
- Travis J Carlson
- Department of Clinical Sciences, High Point University Fred Wilson School of Pharmacy, High Point, North Carolina
| | - Anne J Gonzales-Luna
- Department of Pharmacy Practice and Translational Research, University of Houston College of Pharmacy, Houston, Texas
| | - Kevin W Garey
- Department of Pharmacy Practice and Translational Research, University of Houston College of Pharmacy, Houston, Texas
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Kirwan M, Munshi R, O'Keeffe H, Judge C, Coyle M, Deasy E, Kelly YP, Lavin PJ, Donnelly M, D'Arcy DM. Exploring population pharmacokinetic models in patients treated with vancomycin during continuous venovenous haemodiafiltration (CVVHDF). Crit Care 2021; 25:443. [PMID: 34930430 PMCID: PMC8691013 DOI: 10.1186/s13054-021-03863-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 12/10/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Therapeutic antibiotic dose monitoring can be particularly challenging in septic patients requiring renal replacement therapy. Our aim was to conduct an exploratory population pharmacokinetic (PK) analysis on PK of vancomycin following intermittent infusion in critically ill patients receiving continuous venovenous haemodiafiltration (CVVHDF); focussing on the influence of dialysis-related covariates. METHODS This was a retrospective single-centre tertiary level intensive care unit (ICU) study, which included patients treated concurrently with vancomycin and CVVHDF between January 2015 and July 2016. We extracted clinical, laboratory and dialysis data from the electronic healthcare record (EHR), using strict inclusion criteria. A population PK analysis was conducted with a one-compartment model using the PMetrics population PK modelling package. A base structural model was developed, with further analyses including clinical and dialysis-related data to improve model prediction through covariate inclusion. The final selected model simulated patient concentrations using probability of target attainment (PTA) plots to investigate the probability of different dosing regimens achieving target therapeutic concentrations. RESULTS A total of 106 vancomycin dosing intervals (155 levels) in 24 patients were examined. An acceptable 1-compartment base model was produced (Plots of observed vs. population predicted concentrations (Obs-Pred) R2 = 0.78). No continuous covariates explored resulted in a clear improvement over the base model. Inclusion of anticoagulation modality and vasopressor use as categorical covariates resulted in similar PK parameter estimates, with a trend towards lower parameter estimate variability when using regional citrate anti-coagulation or without vasopressor use. Simulations using PTA plots suggested that a 2 g loading dose followed by 750 mg 12 hourly as maintenance dose, commencing 12 h after loading, is required to achieve adequate early target trough concentrations of at least 15 mg/L. CONCLUSIONS PTA simulations suggest that acceptable trough vancomycin concentrations can be achieved early in treatment with a 2 g loading dose and maintenance dose of 750 mg 12 hourly for critically ill patients on CVVHDF.
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Affiliation(s)
- Marcus Kirwan
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland.,Department of Pharmacy, Tallaght University Hospital, Dublin 24, Ireland
| | - Reema Munshi
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland.,Department of Clinical Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Hannah O'Keeffe
- Department of Nephrology, Tallaght University Hospital, Dublin 24, Ireland
| | - Conor Judge
- Department of Nephrology, Tallaght University Hospital, Dublin 24, Ireland
| | - Mary Coyle
- Department of Pharmacy, Tallaght University Hospital, Dublin 24, Ireland
| | - Evelyn Deasy
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland.,Department of Pharmacy, Tallaght University Hospital, Dublin 24, Ireland
| | - Yvelynne P Kelly
- Department of Critical Care, Tallaght University Hospital, Dublin 24, Ireland.
| | - Peter J Lavin
- Department of Nephrology, Tallaght University Hospital, Dublin 24, Ireland
| | - Maria Donnelly
- Department of Critical Care, Tallaght University Hospital, Dublin 24, Ireland
| | - Deirdre M D'Arcy
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
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Ostroumova OD, Pereverzev AP. Hepatic impairment as a risk factor of adverse drug reactions. CONSILIUM MEDICUM 2021. [DOI: 10.26442/20751753.2021.12.201234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
There are a lot of clinical variants of hepatic impairment ranging from asymptomatic increase in transaminases to acute liver failure and fulminant hepatitis. Hepatic impairment is a polietiologic syndrome. According to the epidemiological study conducted in the United States (19982008), the main causes of hepatic impairment were paracetamol overdose (46%), idiopathic liver dysfunction (14%), other drugs (excluding paracetamol, 11%), viral hepatitis B (7%), other infectious and non-infectious diseases with liver damage (except for viral hepatitis) 7%, autoimmune hepatitis (5%), ischemic hepatitis (syn. hypoxic hepatitis, liver infarction) 4%, viral hepatitis A (3%) and Wilson's disease (2%). Hepatic impairment have a direct impact on the pharmacokinetics and pharmacodynamics of drugs decreasing clearance, elimination and excretion of drugs. Also Transjugular intrahepatic porto-systemic shunts, which are often used to treat portal hypertension in patients with liver cirrhosis, can significantly reduce the presystemic elimination of drugs, thereby increasing their absorption. Moreover, in patients with liver cirrhosis, concomitant renal dysfunction also requires an adjustment of the dose of drugs. Correction of pharmacotherapy in accordance to pharmacokinetic and pharmacodynamic changes of drugs ingested by patients with impaired liver function will improve the quality of medical care and reduce the risks of adverse drug reactions.
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Quantitation of seven sedative and analgesic drugs in whole blood from intensive care patients using liquid chromatography mass spectrometry. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2021. [DOI: 10.1016/j.toxac.2021.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Amer M, Maghrabi K, Bawazeer M, Alshaikh K, Shaban M, Rizwan M, Amin R, De Vol E, Baali M, Altewerki M, Bano M, Alkhaldi F, Alenazi S, Hijazi M. Adjunctive ketamine for sedation in critically ill mechanically ventilated patients: an active-controlled, pilot, feasibility clinical trial. J Intensive Care 2021; 9:54. [PMID: 34462007 PMCID: PMC8404029 DOI: 10.1186/s40560-021-00569-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/25/2021] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE Ketamine has been shown to decrease sedative requirements in intensive care unit (ICU). Randomized trials are limited on patient-centered outcomes. We designed this pilot trial to evaluate the feasibility of a large randomized controlled trial (RCT) testing the effect of ketamine as an adjunct analgosedative compared with standard of care alone as a control group (CG) in critically ill patients with mechanical ventilation (MV). We also provided preliminary evidence on clinically relevant outcomes to plan a larger trial. MATERIAL AND METHODS Pilot, active-controlled, open-label RCT was conducted at medical, surgical, and transplant ICUs at a large tertiary and quaternary care medical institution (King Faisal Specialist Hospital and Research Center, Saudi Arabia). The study included adult patients who were intubated within 24 h, expected to require MV for the next calendar day, and had institutional pain and sedation protocol initiated. Patients were randomized in a 1:1 ratio to adjunct ketamine infusion 1-2 μg/kg/min for 48 h or CG alone. RESULTS Of 437 patients screened from September 2019 through November 2020, 83 (18.9%) patients were included (43 in CG and 40 in ketamine) and 352 (80.5%) were excluded. Average enrollment rate was 3-4 patients/month. Consent and protocol adherence rates were adequate (89.24% and 76%, respectively). Demographics were balanced between groups. Median MV duration was 7 (interquartile range [IQR] 3-9.25 days) in ketamine and 5 (IQR 2-8 days) in CG. Median VFDs was 19 (IQR 0-24.75 days) in ketamine and 19 (IQR 0-24 days) in the CG (p = 0.70). More patients attained goal Richmond Agitation-Sedation Scale at 24 and 48 h in ketamine (67.5% and 73.5%, respectively) compared with CG (52.4% and 66.7%, respectively). Sedatives and vasopressors cumulative use, and hemodynamic changes were similar. ICU length-of-stay was 12.5 (IQR 6-21.2 days) in ketamine, compared with 12 (IQR 5.5-23 days) in CG. No serious adverse events were observed in either group. CONCLUSIONS Ketamine as an adjunct analgosedative agent appeared to be feasible and safe with no negative impact on outcomes, including hemodynamics. This pilot RCT identified areas of improvement in study protocol before conducting a large, adequately powered, multicenter RCT which is likely justified to investigate ketamine association with patient-centered outcomes further. Trial registration ClinicalTrials.gov: NCT04075006. Registered on 30 August 2019. Current controlled trials: ISRCTN14730035. Registered on 3 February 2020.
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Affiliation(s)
- Marwa Amer
- Pharmaceutical Care Division, King Faisal Specialist Hospital and Research Center, (MBC # 11), PO Box 3354, Riyadh, 11211, Kingdom of Saudi Arabia. .,College of Medicine, Alfaisal University, Riyadh, Saudi Arabia.
| | - Khalid Maghrabi
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia.,Department of Critical Care Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mohammed Bawazeer
- Department of Critical Care Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Kamel Alshaikh
- Department of Critical Care Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mohammad Shaban
- Department of Critical Care Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Muhammad Rizwan
- Department of Critical Care Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Rashid Amin
- Pharmaceutical Care Division, King Faisal Specialist Hospital and Research Center, (MBC # 11), PO Box 3354, Riyadh, 11211, Kingdom of Saudi Arabia
| | - Edward De Vol
- Biostatistics, Epidemiology & Scientific Computing Department, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mawadah Baali
- Biostatistics, Epidemiology & Scientific Computing Department, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Malak Altewerki
- Department of Neurosciences, Residency Training Program, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mehreen Bano
- Departments of Nursing, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Fawziah Alkhaldi
- Departments of Nursing, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Sanaa Alenazi
- Departments of Nursing, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Mohammed Hijazi
- Department of Critical Care Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
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Excessive unbound cefazolin concentrations in critically ill patients receiving veno-arterial extracorporeal membrane oxygenation (vaECMO): an observational study. Sci Rep 2021; 11:16981. [PMID: 34417526 PMCID: PMC8379255 DOI: 10.1038/s41598-021-96654-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 08/11/2021] [Indexed: 12/28/2022] Open
Abstract
The scope of extracorporeal membrane oxygenation (ECMO) is expanding, nevertheless, pharmacokinetics in patients receiving cardiorespiratory support are fairly unknown leading to unpredictable drug concentrations. Currently, there are no clear guidelines for antibiotic dosing during ECMO. This study aims to evaluate the pharmacokinetics (PK) of cefazolin in patients undergoing ECMO treatment. Total and unbound plasma cefazolin concentration of critically ill patients on veno-arterial ECMO were determined. Observed PK was compared to dose recommendations calculated by an online available, free dosing software. Concentration of cefazolin varied broadly despite same dosage in all patients. The mean total and unbound plasma concentration were high showing significantly (p = 5.8913 E−09) greater unbound fraction compared to a standard patient. Cefazolin clearance was significantly (p = 0.009) higher in patients with preserved renal function compared with CRRT. Based upon the calculated clearance, the use of dosing software would have led to lower but still sufficient concentrations of cefazolin in general. Our study shows that a “one size fits all” dosing regimen leads to excessive unbound cefazolin concentration in these patients. They exhibit high PK variability and decreased cefazolin clearance on ECMO appears to compensate for ECMO- and critical illness-related increases in volume of distribution.
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17
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Extracellular Water to Total Body Water Ratio in Septic Shock Patients Receiving Protocol-Driven Resuscitation Bundle Therapy. J Clin Med 2021; 10:jcm10132917. [PMID: 34209962 PMCID: PMC8269068 DOI: 10.3390/jcm10132917] [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] [Received: 05/08/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 11/17/2022] Open
Abstract
(1) Bio-electrical impedance analysis (BIA) is a rapid, simple, and noninvasive tool for evaluating the metabolic status and for assessing volume status in critically ill patients. Little is known, however, the prognostic value of body composition analysis in septic shock patients. This study assessed the association between parameters by body composition analysis and mortality in patients with septic shock in the emergency department (ED). (2) Data were prospectively collected on adult patients with septic shock who underwent protocol-driven resuscitation bundle therapy between December 2019 and January 2021. The primary outcome was 30-day mortality. (3) The study included 261 patients, the average ratio of extracellular water (ECW) to total body water (TBW) was significantly higher in non-survivors than in survivors (0.414 vs. 0.401, p < 0.001). Multivariate analysis showed that ECW/TBW ≥ 0.41 (odds ratio (OR), 4.62; 95% confidence interval (CI), 2.31–9.26, p < 0.001), altered mental status (OR, 2.88; 95% CI, 1.28–6.46, p = 0.010), and lactate level (OR, 1.24; 95% CI, 1.12–1.37, p < 0.001) were significantly associated with 30-day mortality in patients with septic shock. (4) ECW/TBW ≥ 0.41 may be associated with 30-day mortality in patients with septic shock receiving protocol-driven resuscitation bundle therapy in the ED.
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Hydromorphone Compared to Fentanyl in Patients Receiving Extracorporeal Membrane Oxygenation. ASAIO J 2021; 67:443-448. [PMID: 33770000 DOI: 10.1097/mat.0000000000001253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Fentanyl is commonly used in critically ill patients receiving extracorporeal membrane oxygenation (ECMO). Fentanyl's lipophilicity and protein binding may contribute to a sequestration of the drug in the ECMO circuit. Hydromorphone lacks these characteristics potentially leading to a more predictable drug delivery and improved pain and sedation management among ECMO patients. This study compared hydromorphone to fentanyl in patients receiving ECMO. This retrospective study included adult patients receiving ECMO for ≥48 hours. Patients were excluded if they required neuromuscular blockade, received both fentanyl and hydromorphone during therapy, or had opioid use before hospitalization. Baseline characteristics included patient demographics, ECMO indication and settings, and details regarding mechanical ventilation. The primary outcome was opioid requirements at 48 hours post cannulation described in morphine milligram equivalent (MME). Secondary endpoints included 24-hour opioid requirements, concurrent sedative use, and differences in pain and sedation scores. No differences were noted between the patients receiving fentanyl (n = 32) or hydromorphone (n = 20). Patients receiving hydromorphone required lower MME compared to fentanyl at 24 hours (88 [37-121] vs. 131 [137-227], p < 0.01) and 48 hours (168 [80-281] vs. 325 [270-449], p < 0.01). The proportion of within-goal pain and sedation scores between groups was similar at 24 and 48 hours. Sedative requirements did not differ between the groups. Patients receiving hydromorphone required less MME compared to fentanyl without any differences in sedative requirements, or agitation-sedation scores at 48 hours. Prospective studies should be completed to validate these findings.
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19
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Marra F, Smolders EJ, El-Sherif O, Boyle A, Davidson K, Sommerville AJ, Marzolini C, Siccardi M, Burger D, Gibbons S, Khoo S, Back D. Recommendations for Dosing of Repurposed COVID-19 Medications in Patients with Renal and Hepatic Impairment. Drugs R D 2021; 21:9-27. [PMID: 33336316 PMCID: PMC7745756 DOI: 10.1007/s40268-020-00333-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2020] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION In December 2019, an outbreak of a novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) began, resulting in a number of antivirals and immune modulators being repurposed to treat the associated coronavirus disease 2019 (COVID-19). Many patients requiring treatment for COVID-19 may have either pre-existing renal or hepatic disease or experience acute renal/hepatic injury as a result of the acute infection. Altered renal or hepatic function can significantly affect drug concentrations of medications due to impaired drug metabolism and excretion, resulting in toxicity or reduced efficacy. The aim of this paper is to review the pharmacokinetics and available study data for the experimental COVID-19 therapies in patients with any degree of renal or hepatic impairment to make recommendations for dosing. METHODS COVID-19 agents included in these recommendations were listed as primaries on the University of Liverpool COVID-19 drug interaction website ( www.covid19-druginteractions.org ), initially identified from Clinicialtrials.gov and ChicCTR.org.cn. A literature search was performed using PubMed and EMBASE as well as product licences and pharmacokinetic databases. FINDINGS Remdesivir, dexamethasone, azithromycin, favipiravir, lopinavir/ritonavir, atazanavir, hydroxychloroquine, interferon beta, ribavirin, tocilizumab, anakinra and sarilumab were identified as experimental drugs being used in COVID-19 trials as of November 2020. Limited study data was found for these drugs in patients with renal or hepatic impairment for COVID-19 or other indications. Recommendations were made based on available data, consideration of pharmacokinetic properties (including variability), the dosing and anticipated treatment duration of each regimen in COVID-19 and known toxicities. CONCLUSION Dosing of drugs used to treat COVID-19 in patients with renal or hepatic impairment is complex. These recommendations were produced to provide guidance to clinicians worldwide who are treating patients with COVID-19, many of whom will have some degree of acute or chronic renal or hepatic impairment.
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Affiliation(s)
- Fiona Marra
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK.
- Department of Pharmacy, NHS Greater Glasgow and Clyde, Glasgow, UK.
| | - Elise J Smolders
- Department of Pharmacy, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands
- Department of Pharmacy, Isala Hospital, Zwolle, The Netherlands
| | - Omar El-Sherif
- Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, UK
| | - Alison Boyle
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
- Department of Pharmacy, NHS Greater Glasgow and Clyde, Glasgow, UK
| | | | | | - Catia Marzolini
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
- Division of Infectious Diseases and Hospital Epidemiology, Departments of Medicine and Clinical Research, University Hospital of Basel, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Marco Siccardi
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - David Burger
- Department of Pharmacy, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Sara Gibbons
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - Saye Khoo
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
- Royal Liverpool University Hospital, Liverpool, UK
| | - David Back
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
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20
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Henrich A, Juif PE, Dingemanse J, Krause A. PK/PD modeling of a clazosentan thorough QT study with hysteresis in concentration-QT and RR-QT. J Pharmacokinet Pharmacodyn 2021; 48:213-224. [PMID: 33389549 DOI: 10.1007/s10928-020-09728-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 11/06/2020] [Indexed: 01/19/2023]
Abstract
Clazosentan's potential QT liability was investigated in a thorough QT study in which clazosentan was administered intravenously as a continuous infusion of 20 mg/h immediately followed by 60 mg/h. Clazosentan prolonged the placebo-corrected change-from-baseline QT interval corrected for RR with Fridericia's formula (ΔΔQTcF) with the maximum QT effect occurring 4 h after the maximum drug concentration, apparently associated with vomiting. The delayed effect precluded the standard linear modeling approach. This analysis aimed at characterizing the concentration-QT relationship in consideration of RR-QT hysteresis, concentration-ΔΔQTcF hysteresis, and the influence of vomiting. Nonlinear mixed-effects modeling was applied to characterize pharmacokinetics and pharmacodynamics, i.e., ΔΔQTcF. Simulations were used to predict ΔΔQTcF for expected therapeutic dose used in Phase 3 clinical development. Correction for RR-QT hysteresis did not influence ΔΔQTcF to a relevant extent. Pharmacokinetics of clazosentan were best described by a linear two-compartment model. The delayed QT prolongation was characterized by an indirect-response model with loglinear drug effect. Vomiting had no statistically significant influence on QT prolongation despite apparent differences between subjects vomiting and not vomiting, probably since vomiting occurred mostly after the main QT prolongation. Following a simulated 3-h infusion of 15 mg/h of clazosentan, the upper bound of the predicted 90% CI for mean ΔΔQTcF was expected to exceed the 10-ms regulatory threshold of concern with maximum effect 3.5 h after end of infusion. TRN: NCT03657446, 05 Sep 2018.
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Affiliation(s)
- Andrea Henrich
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, CH-4123, Allschwil, Switzerland
| | - Pierre-Eric Juif
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, CH-4123, Allschwil, Switzerland
| | - Jasper Dingemanse
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, CH-4123, Allschwil, Switzerland
| | - Andreas Krause
- Department of Clinical Pharmacology, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, CH-4123, Allschwil, Switzerland.
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21
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Feyaerts AF, Luyten W. Vitamin C as prophylaxis and adjunctive medical treatment for COVID-19? Nutrition 2020; 79-80:110948. [PMID: 32911430 PMCID: PMC7381407 DOI: 10.1016/j.nut.2020.110948] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/14/2020] [Accepted: 07/04/2020] [Indexed: 02/07/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 causes the potentially fatal coronavirus disease 2019 (COVID-19). Already during the outbreak of the severe acute respiratory syndrome coronavirus 1, the use of vitamin C was suggested. Many patients with severe COVID-19 have elevated levels of the mediators interleukin-6 and endothelin-1. These mediators may explain the age dependence of COVID-19 pneumonia, the preponderance of male and obese or hypertensive patients, as well as of persons of color and smokers. There is clear evidence that vitamin C in high doses can reduce these mediators. Vitamin C is cheap and safe. Hence, using a relatively low dose of vitamin C as prophylaxis, and in cases of severe COVID-19, an (intravenous) high-dose regimen may be beneficial. Ongoing clinical trials are expected to provide more definitive evidence.
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Affiliation(s)
- Adam F Feyaerts
- VIB Center for Microbiology, KU Leuven, Leuven, Belgium; Laboratory of Molecular Cell Biology, KU Leuven, Leuven, Belgium; Department of Technology, UCLL, Leuven, Belgium.
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22
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Noval M, Seung H, Armahizer M. Evaluation of Fosphenytoin Therapeutic Drug Monitoring in the Neurocritical Care Unit. Drugs R D 2020; 20:17-22. [PMID: 31925752 PMCID: PMC7067712 DOI: 10.1007/s40268-019-00292-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE The aim of this study was to determine whether the current method of calculating a fosphenytoin reloading dose results in a therapeutic free phenytoin level on subsequent days. METHODS Medical records of patients receiving fosphenytoin in the neurocritical care unit between July 2017 and June 2018 were screened. Included patients were those who had received at least three doses of fosphenytoin and required reloading doses according to concentrations obtained through therapeutic drug monitoring. Free phenytoin levels were categorized based on the prespecified patient-specific target range, generally between 1.5 and 2.5 mcg/mL. RESULTS Of the fosphenytoin reloading doses administered, 48% (73/152) resulted in a therapeutic free phenytoin concentration on the subsequent day, with the remaining 52% resulting in nontherapeutic levels (39% subtherapeutic, 13% supratherapeutic). Our evaluation of reloading dose calculation strategies indicated that patients were two times as likely to obtain a therapeutic level when a modified pharmacokinetic equation omitting the use of volume of distribution or salt formulation was used (58%, n = 39) than they were with doses calculated using the current pharmacokinetic model (41%, n = 20) or doses based on provider preference (39%, n = 14). CONCLUSION The current method of calculating a fosphenytoin reloading dose in the critically ill population does not consistently result in therapeutic concentrations. With multiple factors affecting the pharmacokinetics of critically ill patients, the creation of a new pharmacokinetic model with less emphasis on volume of distribution may more consistently result in therapeutic concentrations.
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Affiliation(s)
- Mandee Noval
- University of Maryland Medical Center, 22 S. Greene Street, Baltimore, MD, USA.
| | - Hyunuk Seung
- University of Maryland School of Pharmacy, 20 N Pine St, Baltimore, MD, USA
| | - Michael Armahizer
- University of Maryland Medical Center, 22 S. Greene Street, Baltimore, MD, USA
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23
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Machiels JD, Bleeker-Rovers CP, ter Heine R, Rahamat-Langendoen J, de Mast Q, ten Oever J, Bousema T, van Crevel R, Wertheim HFL. Reply to Gautret et al: hydroxychloroquine sulfate and azithromycin for COVID-19: what is the evidence and what are the risks? Int J Antimicrob Agents 2020; 56:106056. [PMID: 32674929 PMCID: PMC7357524 DOI: 10.1016/j.ijantimicag.2020.106056] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/09/2020] [Accepted: 06/12/2020] [Indexed: 02/06/2023]
Abstract
The severity of COVID-19 has resulted in a global rush to find the right antiviral treatment to conquer the pandemic and to treat patients. This requires reliable studies to support treatment. In a recently published study by Gautret et al. the authors concluded that hydroxychloroquine monotherapy and hydroxychloroquine in combination with azithromycin reduced viral load. However, this trial has several major methodological issues, including the design, outcome measure and the statistical analyses. In this paper we discuss the background, clinical evidence, pharmacology and methodological issues related to this clinical trial. We understand the rush to release results, however in case conclusions are far reaching the evidence needs to be robust.
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Affiliation(s)
- Julian D Machiels
- Department of Medical Microbiology & Radboudumc Center for Infectious Diseases, the Netherlands
| | | | - Rob ter Heine
- Department of Pharmacy & Radboudumc Center for Infectious Diseases, the Netherlands
| | | | - Quirijn de Mast
- Department of Internal Medicine & Radboudumc Center for Infectious Diseases, the Netherlands
| | - Jaap ten Oever
- Department of Internal Medicine & Radboudumc Center for Infectious Diseases, the Netherlands
| | - Teun Bousema
- Department of Medical Microbiology & Radboudumc Center for Infectious Diseases, the Netherlands
| | - Reinout van Crevel
- Department of Internal Medicine & Radboudumc Center for Infectious Diseases, the Netherlands
| | - Heiman FL Wertheim
- Department of Medical Microbiology & Radboudumc Center for Infectious Diseases, the Netherlands,Corresponding author
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24
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Krzych ŁJ, Czok M, Putowski Z. Is Antimicrobial Treatment Effective During Therapeutic Plasma Exchange? Investigating the Role of Possible Interactions. Pharmaceutics 2020; 12:E395. [PMID: 32344863 PMCID: PMC7284838 DOI: 10.3390/pharmaceutics12050395] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 12/31/2022] Open
Abstract
Antimicrobial treatment during therapeutic plasma exchange (TPE) remains a complex issue. Recommendations based on a limited number of experimental studies should be implemented in clinical practice with caution. Effective management of infections due to plasma or albumin-related interactions, as well as impaired pharmacokinetics, in critical illness is difficult. Knowing the pharmacokinetics of the drugs concerned and the procedural aspects of plasmapheresis should be helpful in planning personalized treatment. In general, possessing a low distribution volume, a high protein-binding affinity, a low endogenous clearance rate, and long distribution and elimination half-lives make a drug more prone to elimination during TPE. A high frequency and longer duration of the procedure may also contribute to altering a drug's concentration. The safest choice would be to start and finish TPE before antimicrobial agent infusion. If this not feasible, a reasonable alternative is to avoid administering the drug just before TPE and to delay the procedure for the time of the administered drug's distributive phase. Ultimately, if plasma exchange must be performed urgently or the drug has a very narrow therapeutic index, monitoring its plasma concentration is advised.
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Affiliation(s)
- Łukasz J. Krzych
- Department of Anesthesiology and Intensive Care, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland; 14 Medyków Street, 40-752 Katowice, Poland
| | - Marcelina Czok
- Students’ Scientific Society, Department of Anesthesiology and Intensive Care, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland; 14 Medyków Street, 40-752 Katowice, Poland
| | - Zbigniew Putowski
- Students’ Scientific Society, Department of Anesthesiology and Intensive Care, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland; 14 Medyków Street, 40-752 Katowice, Poland
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25
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Parikh R, Bates JHT, Poynter ME, Suratt BT, Parsons PE, Kien CL, Heyland DK, Crain KI, Martin J, Garudathri J, Stapleton RD. Pharmacokinetics of omega-3 fatty acids in patients with severe sepsis compared with healthy volunteers: A prospective cohort study. Clin Nutr 2020; 39:958-965. [PMID: 31005335 PMCID: PMC6785383 DOI: 10.1016/j.clnu.2019.03.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 03/27/2019] [Accepted: 03/31/2019] [Indexed: 01/25/2023]
Abstract
BACKGROUND Pharmacokinetics (PK) of pharmaceuticals and pharmaconutrients are poorly understood in critically ill patients, and dosing is often based on healthy subject data. This might be particularly problematic with enteral medications due to metabolic abnormalities and impaired gastrointestinal tract absorption common in critically ill patients. Utilizing enteral fish oil, this study was undertaken to better understand and define PK of enteral omega-3 fatty acids (eicospentaenoic acid [EPA] and docosahexaenoic acid [DHA]) in critically ill patients with severe sepsis. MATERIALS AND METHODS Healthy volunteers (n = 15) and mechanically ventilated (MV) adults with severe sepsis (n = 10) were recruited and received 9.75 g EPA and 6.75 g DHA daily in two divided enteral doses of fish oil for 7 days. Volunteers continued their normal diet without other sources of fish oil, and sepsis patients received standard enteral feeding. Blood was collected at frequent intervals during the 14-day study period. Peripheral blood mononuclear cells (PMBCs) and neutrophils were isolated and analyzed for membrane fatty acid (FA) content. Mixed linear models and t-tests were used to analyze changes in FA levels over time and FA levels at individual time points, respectively. PK parameters were obtained based on single compartment models of EPA and DHA kinetics. RESULTS Healthy volunteers were 41.1 ± 10.3 years; 67% were women. In patients with severe sepsis (55.6 ± 13.4 years, 50% women), acute physiologic and chronic health evaluation (APACHE) II score was 27.2 ± 8.8 at ICU admission and median MV duration was 10.5 days. Serum EPA and DHA were significantly lower in sepsis vs. healthy subjects over time. PBMC EPA concentrations were generally not different between groups over time, while PBMC DHA was higher in sepsis patients. Neutrophil EPA and DHA concentrations were similar between groups. The half-life of EPA in serum and neutrophils was significantly shorter in sepsis patients, whereas other half-life parameters did not vary significantly between healthy volunteers and sepsis patients. CONCLUSIONS While incorporation of n-3 FAs into PBMC and neutrophil membranes was relatively similar between healthy volunteers and sepsis patients receiving identical high doses of fish oil for one week, serum EPA and DHA were significantly lower in sepsis patients. These findings imply that serum concentrations and EPA and DHA may not be the dominant driver of leukocyte membrane incorporation of EPA and DHA. Furthermore, lower serum EPA and DHA concentrations suggest that either these n-3 FAs were being metabolized rapidly in sepsis patients or that absorption of enteral medications and pharmaconutrients, including fish oil, may be impaired in sepsis patients. If enteral absorption is impaired, doses of enteral medications administered to critically ill patients may be suboptimal.
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Affiliation(s)
- Radhika Parikh
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Jason H T Bates
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Matthew E Poynter
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Benjamin T Suratt
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Polly E Parsons
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - C Lawrence Kien
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | | | - Karen I Crain
- University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Julie Martin
- Oregon Health & Science University, Portland, OR, USA
| | | | - Renee D Stapleton
- University of Vermont Larner College of Medicine, Burlington, VT, USA.
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Mali NB, Deshpande SP, Wandalkar PP, Gupta VA, Karnik ND, Gogtay NJ, Nataraj G, Mehta PR, Thatte U. Single-dose and Steady-state Pharmacokinetics of Vancomycin in Critically Ill Patients Admitted to Medical Intensive Care Unit of India. Indian J Crit Care Med 2020; 23:513-517. [PMID: 31911742 PMCID: PMC6900894 DOI: 10.5005/jp-journals-10071-23289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Rationale Vancomycin remains the standard of care for gram-positive bacterial infections, though there are significant developments in newer antibacterial agents. Efficacy can be improved by linking pharmacokinetic with pharmacodynamic principles, thus leading to optimum antibiotic exposure. There is scarcity of pharmacokinetic data in Indian intensive care unit (ICU) population. Materials and methods Fifteen subjects with suspected or proven gram-positive bacterial infection of either gender between 18 years and 65 years of age were enrolled. Vancomycin at the dose of 1 g every 12 hours was administered over 1-hour period and pharmacokinetic assessments performed on blood samples collected on days 1 and 3. Vancomycin concentrations were measured on validated liquid chromatography mass spectrometry method. Pharmacokinetic parameters were calculated using Winnonlin (Version 6.3; Pharsight, St. Louis, MO). Results The mean Cmax, elimination half-life, AUC0–12hours, volume of distribution, and clearance of single dose were 36.46 μg/mL (±14.87), 3.98 hours (±1.31), 113.51 μg/mL (±49.51), 52.01 L (±31.31), and 8.90 mL/minute (±3.29), respectively, and at steady state were 40.87 μg/mL (±19.29), 6.27 hours (±3.39), 147.94 μg/mL (±72.89), 56.39 L (±42.13), and 6.98 mL/minute (±4.48), respectively. The elimination half-life increased almost two-fold at steady state. The steady state mean AUC0–24 was 295.89 µg/mL (±153.82). Out of 45 trough levels, 32 (71.11%) concentrations were below recommended range. Conclusion Recommended AUC0–24hours and trough concentrations were not achieved in majority of patients with current dosing, suggesting reevaluation of current vancomycin dosing. Individualized treatment based on close monitoring of vancomycin serum concentrations in critically ill patients is imperative. How to cite this article Mali NB, Deshpande SP, Wandalkar PP, Gupta VA, Karnik ND, Gogtay NJ, et al. Single-dose and Steady-state Pharmacokinetics of Vancomycin in Critically Ill Patients Admitted to Medical Intensive Care Unit of India. IJCCM 2019;23(11):513–517.
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Affiliation(s)
- Nitin B Mali
- Department of Clinical Pharmacology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Siddharth P Deshpande
- Department of Clinical Pharmacology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Poorwa P Wandalkar
- Department of Clinical Pharmacology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Vishal A Gupta
- Department of Medicine, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Niteen D Karnik
- Department of Medicine, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Nithya J Gogtay
- Department of Clinical Pharmacology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Gita Nataraj
- Department of Microbiology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Preeti R Mehta
- Department of Microbiology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Urmila Thatte
- Department of Clinical Pharmacology, Seth Gordhandas Sunderdas Medical College and King Edward Memorial Hospital, Mumbai, Maharashtra, India
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Shahrami B, Najmeddin F, Rouini MR, Najafi A, Sadeghi K, Amini S, Khezrnia SS, Sharifnia HR, Mojtahedzadeh M. Evaluation of Amikacin Pharmacokinetics in Critically Ill Patients with Intra-abdominal Sepsis. Adv Pharm Bull 2019; 10:114-118. [PMID: 32002369 PMCID: PMC6983982 DOI: 10.15171/apb.2020.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/07/2019] [Accepted: 09/18/2019] [Indexed: 12/23/2022] Open
Abstract
Purpose: Although the current widespread use of amikacin is in intra-abdominal sepsis treatment, its pharmacokinetic changes in the present setting are not yet well known. This study was aimed to evaluate the amikacin pharmacokinetic profile in critically ill patients with intraabdominal sepsis compared to pneumosepsis.
Methods: Adult septic patients received amikacin therapy were studied. Patients with intraabdominal sepsis were enrolled in group 1 (n=16), and patients with pneumosepsis were enrolled in group 2 (n=13). The amikacin serum concentrations were evaluated in the first, second, fourth and sixth hours after initiating 30-minute infusion. The pharmacokinetic parameters were calculated for each patient.
Results: There was no significant difference in the volume of distribution between the two groups (0.33±0.08 vs. 0.28±0.10 L/kg, P=0.193). The amikacin clearance was significantly lower in group 1 compared to group 2 (58.5±21.7 vs. 83.9±37.0 mL/min, P=0.029). There was no significant correlation between amikacin clearance and creatinine clearance estimated by Cockcroft-Gault formula in all patients (P=0.206). The half-life was significantly longer in group 1 compared to group 2 (5.3±2.8 vs. 3.4±3.2 hours, P=0.015).
Conclusion: Pathophysiologic changes following intra-abdominal sepsis can affect amikacin pharmacokinetics behavior. The clearance and half-life may change, but the alteration of the volume of distribution is not significantly different in comparison with pneumosepsis. Further studies are required to evaluate the pharmacokinetic variables of amikacin in critically ill patients with intra-abdominal sepsis.
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Affiliation(s)
- Bita Shahrami
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Farhad Najmeddin
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Rouini
- Department of Pharmaceutics, Tehran University of Medical Sciences, Tehran, Iran
| | - Atabak Najafi
- Department of Anesthesiology and Critical Care, Tehran University of Medical Sciences, Tehran, Iran
| | - Kourosh Sadeghi
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahideh Amini
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Hamid Reza Sharifnia
- Department of Anesthesiology and Critical Care, Tehran University of Medical Sciences, Tehran, Iran
| | - Mojtaba Mojtahedzadeh
- Department of Clinical Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Sieg A, Pandya K, Winstead R, Evans R. Overview of Pharmacological Considerations in Extracorporeal Membrane Oxygenation. Crit Care Nurse 2019; 39:29-43. [PMID: 30936129 DOI: 10.4037/ccn2019236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Extracorporeal membrane oxygenation has become more widely used in recent years. Although this technology has proven to be lifesaving, it is not devoid of complications contributing to significant morbidity and mortality. Nurses who care for patients receiving extracorporeal membrane oxygenation should further their understanding of changes in medication profiles due to complex interactions with the extracorporeal membrane oxygenation circuitry. The aim of this comprehensive review is to give nurses a better understanding of analgesic, sedative, anti-infective, and anticoagulation medications that are frequently used to treat patients receiving extracorporeal membrane oxygenation.
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Affiliation(s)
- Adam Sieg
- Adam Sieg is an assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy, Lexington, Kentucky, and a clinical pharmacist specialist in advanced heart failure and heart transplant/mechanical circulatory support. .,Komal Pandya is a cardiothoracic surgery clinical pharmacist with the University of Kentucky Medical Center in Lexington, Kentucky, and adjunct assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy. .,Ryan Winstead is a clinical transplant specialist at Virginia Commonwealth University Health, Richmond, Virginia. .,Rickey Evans is an assistant professor in the Department of Clinical Pharmacy and Outcomes Sciences at the University of South Carolina College of Pharmacy and clinical pharmacy specialist in critical care at Palmetto Health Richland in Columbia, South Carolina.
| | - Komal Pandya
- Adam Sieg is an assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy, Lexington, Kentucky, and a clinical pharmacist specialist in advanced heart failure and heart transplant/mechanical circulatory support.,Komal Pandya is a cardiothoracic surgery clinical pharmacist with the University of Kentucky Medical Center in Lexington, Kentucky, and adjunct assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy.,Ryan Winstead is a clinical transplant specialist at Virginia Commonwealth University Health, Richmond, Virginia.,Rickey Evans is an assistant professor in the Department of Clinical Pharmacy and Outcomes Sciences at the University of South Carolina College of Pharmacy and clinical pharmacy specialist in critical care at Palmetto Health Richland in Columbia, South Carolina
| | - Ryan Winstead
- Adam Sieg is an assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy, Lexington, Kentucky, and a clinical pharmacist specialist in advanced heart failure and heart transplant/mechanical circulatory support.,Komal Pandya is a cardiothoracic surgery clinical pharmacist with the University of Kentucky Medical Center in Lexington, Kentucky, and adjunct assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy.,Ryan Winstead is a clinical transplant specialist at Virginia Commonwealth University Health, Richmond, Virginia.,Rickey Evans is an assistant professor in the Department of Clinical Pharmacy and Outcomes Sciences at the University of South Carolina College of Pharmacy and clinical pharmacy specialist in critical care at Palmetto Health Richland in Columbia, South Carolina
| | - Rickey Evans
- Adam Sieg is an assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy, Lexington, Kentucky, and a clinical pharmacist specialist in advanced heart failure and heart transplant/mechanical circulatory support.,Komal Pandya is a cardiothoracic surgery clinical pharmacist with the University of Kentucky Medical Center in Lexington, Kentucky, and adjunct assistant professor in the Department of Pharmacy Practice and Science at the University of Kentucky College of Pharmacy.,Ryan Winstead is a clinical transplant specialist at Virginia Commonwealth University Health, Richmond, Virginia.,Rickey Evans is an assistant professor in the Department of Clinical Pharmacy and Outcomes Sciences at the University of South Carolina College of Pharmacy and clinical pharmacy specialist in critical care at Palmetto Health Richland in Columbia, South Carolina
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Dauphin-Ducharme P, Yang K, Arroyo-Currás N, Ploense KL, Zhang Y, Gerson J, Kurnik M, Kippin TE, Stojanovic MN, Plaxco KW. Electrochemical Aptamer-Based Sensors for Improved Therapeutic Drug Monitoring and High-Precision, Feedback-Controlled Drug Delivery. ACS Sens 2019; 4:2832-2837. [PMID: 31556293 PMCID: PMC6886665 DOI: 10.1021/acssensors.9b01616] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The electrochemical aptamer-based (E-AB) sensing platform appears to be a convenient (rapid, single-step, and calibration-free) and modular approach to measure concentrations of specific molecules (irrespective of their chemical reactivity) directly in blood and even in situ in the living body. Given these attributes, the platform may thus provide significant opportunities to render therapeutic drug monitoring (the clinical practice in which dosing is adjusted in response to plasma drug measurements) as frequent and convenient as the measurement of blood sugar has become for diabetics. The ability to measure arbitrary molecules in the body in real time could even enable closed-loop feedback control over plasma drug levels in a manner analogous to the recently commercialized controlled blood sugar systems. As initial exploration of this, we describe here the selection of an aptamer against vancomycin, a narrow therapeutic window antibiotic for which therapeutic monitoring is a critical part of the standard of care, and its adaptation into an electrochemical aptamer-based (E-AB) sensor. Using this sensor, we then demonstrate: (i) rapid (seconds) and convenient (single-step and calibration-free) measurement of plasma vancomycin in finger-prick-scale samples of whole blood, (ii) high-precision measurement of subject-specific vancomycin pharmacokinetics (in a rat animal model), and (iii) high-precision, closed-loop feedback control over plasma levels of the drug (in a rat animal model). The ability to not only track (with continuous-glucose-monitor-like measurement frequency and convenience) but also actively control plasma drug levels provides an unprecedented route toward improving therapeutic drug monitoring and, more generally, the personalized, high-precision delivery of pharmacological interventions.
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Affiliation(s)
- Philippe Dauphin-Ducharme
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Center for Bioengineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Kyungae Yang
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University, New York, New York 10032, United States
| | - Netzahualcóyotl Arroyo-Currás
- Department of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Kyle L. Ploense
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Center for Bioengineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Yameng Zhang
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University, New York, New York 10032, United States
| | - Julian Gerson
- Department of Psychological and Brain Sciences, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Martin Kurnik
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Center for Bioengineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Tod E. Kippin
- Department of Psychological and Brain Sciences, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Milan N. Stojanovic
- Center for Innovative Diagnostic and Therapeutic Approaches, Department of Medicine, Columbia University, New York, New York 10032, United States
- Department of Biomedical Engineering and Systems Biology, Columbia University, New York, New York 10032, United States
| | - Kevin W. Plaxco
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Center for Bioengineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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Continuous infusion of physostigmine in patients with perioperative septic shock: A pharmacokinetic/pharmacodynamic study with population pharmacokinetic modeling. Pharmacotherapy 2019; 118:109318. [PMID: 31398669 DOI: 10.1016/j.biopha.2019.109318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 07/27/2019] [Accepted: 07/31/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND In the context of the cholinergic anti-inflammatory pathway, the clinical trial Anticholium® per Se (EudraCT Number: 2012-001650-26, ClinicalTrials.gov NCT03013322) addressed the possibility of taking adjunctive physostigmine salicylate treatment in septic shock from bench to bedside. Pharmacokinetics (PK) are likely altered in critically ill patients; data on physostigmine PK and target concentrations are sparse, particularly for continuous infusion. Our objective was to build a population PK (popPK) model for physostigmine, and further evaluate pharmacodynamics (PD) and concentration-response relationship in this setting. METHODS In the randomized, double-blind, placebo-controlled trial, 20 patients with perioperative septic shock either received an initial dose of 0.04 mg/kg physostigmine salicylate, followed by continuous infusion of 1 mg/h for up to 120 h, or equivalent volumes of 0.9% sodium chloride (placebo group). Physostigmine plasma concentrations and acetylcholinesterase (AChE) activity were measured; concentration-response associations were evaluated, and popPK and PD modeling was performed with NONMEM. RESULTS Steady state physostigmine plasma concentrations reached 7.60 ± 2.81 ng/mL (mean ± standard deviation [SD]). PK was best described by a two-compartment model with linear clearance. Significant covariate effects were detected for body weight and age on clearance, as well as a high inter-individual variability of the central volume of distribution. AChE activity was significantly reduced to 30.5%-50.6% of baseline activity during physostigmine salicylate infusion. A sigmoidal direct effect PD model best described enzyme inhibition by physostigmine, with an estimated half maximal effective concentration (EC50) of 5.99 ng/mL. CONCLUSIONS PK of physostigmine in patients with septic shock displayed substantial inter-individual variability with body weight and age influencing the clearance. Physostigmine inhibited AChE activity with a sigmoidal concentration-response effect.
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Morelli A, Sanfilippo F, Rehberg S, Ertmer C. The authors reply. Crit Care Med 2019; 47:e722-e723. [DOI: 10.1097/ccm.0000000000003825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Martens-Lobenhoffer J, Monastyrski D, Tröger U, Bode-Böger SM. Stability of meropenem in plasma versus dried blood spots (DBS). J Pharm Biomed Anal 2019; 170:279-284. [DOI: 10.1016/j.jpba.2019.03.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/21/2019] [Accepted: 03/24/2019] [Indexed: 12/21/2022]
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Maxwell EN, Johnson B, Cammilleri J, Ferreira JA. Intravenous Acetaminophen-Induced Hypotension: A Review of the Current Literature. Ann Pharmacother 2019; 53:1033-1041. [PMID: 31046402 DOI: 10.1177/1060028019849716] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective: Recent literature suggests that intravenous (IV) administration may cause hypotension in hospitalized patients; data further suggest that this effect is most pronounced in the critically ill. The purpose of this review is to identify and evaluate current literature that addresses the incidence and implications of IV acetaminophen-induced hypotension. Data Sources: A literature search of MEDLINE, Cochrane, and EMBASE databases was performed (2002-2019) using the following terms: acetaminophen, paracetamol, intravenous, and hypotension. Abstracts and peer-reviewed publications were reviewed. Study Selection and Data Extraction: Relevant English-language studies conducted in humans evaluating the hemodynamic effects of IV acetaminophen were considered. Data Synthesis: A majority of the 19 studies included in this review identified a statistically significant drop in hemodynamic variables after the administration of 500 to 1000 mg IV acetaminophen as measured by changes in systolic blood pressure, diastolic blood pressure, or mean arterial pressure. Of the trials reporting vasopressor use, the authors found a significant increase in vasopressor requirements following IV acetaminophen administration. Relevance to Patient Care and Clinical Practice: This review represents the first comprehensive review of IV acetaminophen-induced hypotension. The findings raise the question of whether IV acetaminophen is an appropriate choice for inpatient pain or temperature management in the critically ill. Conclusions: Available evidence indicates that the administration of IV acetaminophen may be harmful in the critically ill. Additional monitoring is likely required when using IV acetaminophen in this specific population, particularly if a patient is hemodynamically unstable prior to administration.
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Ferrone V, Cotellese R, Cichella A, Raimondi P, Carlucci M, Palumbo P, Carlucci G. Meropenem and ciprofloxacin in complicated gastric surgery for cancer patients: A simple SPE–UHPLC–PDA method for their determination in human plasma. Biomed Chromatogr 2019; 33:e4450. [DOI: 10.1002/bmc.4450] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 11/15/2018] [Accepted: 11/27/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Vincenzo Ferrone
- Dipartimento di FarmaciaOrali e Biotecnologiche ‐ Università degli Studi “G. d'Annunzio” Chieti‐Pescara Chieti Italy
| | - Roberto Cotellese
- Dipartimento di Scienze MedicheOrali e Biotecnologiche ‐ Università degli Studi “G. d'Annunzio” Chieti‐Pescara Chieti Italy
| | - Annadomenica Cichella
- Dipartimento di Scienze MedicheOrali e Biotecnologiche ‐ Università degli Studi “G. d'Annunzio” Chieti‐Pescara Chieti Italy
| | - Paolo Raimondi
- Dipartimento di Scienze MedicheOrali e Biotecnologiche ‐ Università degli Studi “G. d'Annunzio” Chieti‐Pescara Chieti Italy
| | - Maura Carlucci
- Dipartimento di Scienze MedicheOrali e Biotecnologiche ‐ Università degli Studi “G. d'Annunzio” Chieti‐Pescara Chieti Italy
| | - Paola Palumbo
- Dipartimento di Medicina Clinica, Sanità PubblicaScienze della Vita e dell'Ambiente ‐ Università degli studi di L'Aquila L'Aquila Italy
| | - Giuseppe Carlucci
- Dipartimento di FarmaciaOrali e Biotecnologiche ‐ Università degli Studi “G. d'Annunzio” Chieti‐Pescara Chieti Italy
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Fischer M, Jackson M, Abd-Elsayed A. Pain in the Neurocritical Care Unit. TEXTBOOK OF NEUROANESTHESIA AND NEUROCRITICAL CARE 2019:319-331. [DOI: 10.1007/978-981-13-3390-3_22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Goti V, Chaturvedula A, Fossler MJ, Mok S, Jacob JT. Hospitalized Patients With and Without Hemodialysis Have Markedly Different Vancomycin Pharmacokinetics: A Population Pharmacokinetic Model-Based Analysis. Ther Drug Monit 2018; 40:212-221. [PMID: 29470227 DOI: 10.1097/ftd.0000000000000490] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Despite being in clinical use for about 6 decades, vancomycin dosing remains perplexing and complex. METHODS A population pharmacokinetic modeling and simulation approach was used to evaluate the efficiency of the current nomogram-based dosing of vancomycin. Serum vancomycin concentrations were obtained as a part of routine therapeutic drug monitoring from two 500-bed academic medical centers. A population pharmacokinetic model was first built using these therapeutic drug monitoring data. Population pharmacokinetic modeling was conducted using NONMEM (7.2 and 7.3). The forward addition-backward elimination approach was used to test the covariate effects. Appropriate numerical and visual criteria were used as model diagnostics for checking model appropriateness and model qualification. The current nomogram efficiency was evaluated by determining the percentage of subjects in the therapeutic range (10-20 mg/L). RESULTS A 2-compartment model with between-subject variability on clearance (CL), central volume of distribution (Vc), and peripheral volume of distribution best fit the data. Blood urea nitrogen, age, creatinine clearance, and hemodialysis status were significant covariates on clearance. Hemodialysis status was a significant covariate on Vc and peripheral volume of distribution. In the final model, creatinine clearance was retained as a covariate on CL whereas hemodialysis status was retained as covariate on both CL and Vc. Using Monte Carlo simulations, the current nomogram was optimized by the addition of a loading dose and reducing the maintenance doses. The current nomogram is suboptimal. Optimization of the nomogram resulted in >40% subjects consistently being in the therapeutic range at troughs collected after the first 6 doses. CONCLUSIONS CL and Vc differ markedly between patients undergoing hemodialysis and those not undergoing hemodialysis. Dosing nomogram based on these covariate relationships may potentially help in accurate dosing of vancomycin.
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Affiliation(s)
- Vineet Goti
- Department of Pharmaceutical Sciences, Mercer University, Atlanta, Georgia
| | - Ayyappa Chaturvedula
- Department of Pharmaceutical Sciences, Mercer University, Atlanta, Georgia.,Department of Pharmacotherapy, University of North Texas Health Science Center, Fort Worth, Texas
| | - Michael J Fossler
- Department of Pharmaceutical Sciences, Mercer University, Atlanta, Georgia.,Clinical Operations & Quantitative Sciences, Trevena Inc, King of Prussia, Pennsylvania
| | - Steve Mok
- Department of Pharmacy, Emory Healthcare
| | - Jesse T Jacob
- Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
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Cunha CB. Antibiotic Stewardship Program Perspective: Oral Antibiotic Therapy for Common Infectious Diseases. Med Clin North Am 2018; 102:947-954. [PMID: 30126583 DOI: 10.1016/j.mcna.2018.05.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traditionally, initial antibiotic therapy was administered intravenously (IV). Over the past 3 decades, there has been increased understanding, appreciation, and application of pharmacokinetic (PK) and pharmacodynamic (PD) principles in antibiotic therapy. The utilization of PK/PD parameters as applied to antimicrobial therapy has led to optimizing dosage regimens as well as increased awareness and experience with oral versus antibiotic therapy. When an oral antibiotic, given at the same dose as its IV formulation, results in the same serum/tissue levels, then oral antibiotics should be used whenever possible. When chosen carefully, oral therapy provides many benefits over IV therapy.
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Affiliation(s)
- Cheston B Cunha
- Antibiotic Stewardship Program, Division of Infectious Disease, Rhode Island Hospital, 593 Eddy Street, Physicians Office Building, Suite #328, Providence, RI 02903, USA.
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Kovacevic MP, Szumita PM, Dube KM, DeGrado JR. Transition From Continuous Infusion Fentanyl to Hydromorphone in Critically Ill Patients. J Pharm Pract 2018; 33:129-135. [PMID: 29996718 DOI: 10.1177/0897190018786832] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND The 2013 Society of Critical Care Medicine guidelines for the management of pain, agitation, and delirium in adult intensive care unit (ICU) patients recommend intravenous opioids as first-line therapy to treat nonneuropathic pain. There is a paucity of literature describing possible benefits of utilizing specific opioids over others in ICU patients. OBJECTIVE The objective was to identify rationales for the transition from continuous infusion fentanyl to continuous infusion hydromorphone in critically ill patients. METHODS This was a single-center, prospective, observational analysis of adult ICU patients who were transitioned from fentanyl to hydromorphone. The major end point was to characterize the primary reason for transition. Minor end points included secondary reason(s) for transition, transition dosing, changes in continuous sedative requirements, and level of sedation. RESULTS Forty-six patients were included in the analysis. The primary rationale for transition was ventilator compliance (28.3%), followed by tachyphylaxis or better pain control (19.6%), and reduction in sedatives (13.0%). The most common secondary reason(s) for transition included reduction in sedatives (47.8%), opioid rotation (32.6%), and obesity (30.4). Median fentanyl rate of 100 µg/h was transitioned to 1 mg/h of hydromorphone. The percentage of patients requiring the use of continuous sedatives was decreased in the 24 hours following transition (P = .005); however, patients were more deeply sedated (P = .02). CONCLUSION Rationales for transition were to improve ventilator compliance, optimize patient-specific pharmacokinetics, and limit overall sedative exposure.
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Affiliation(s)
- Mary P Kovacevic
- Department of Pharmacy, Brigham and Women's Hospital, Boston, MA, USA
| | - Paul M Szumita
- Department of Pharmacy, Brigham and Women's Hospital, Boston, MA, USA
| | - Kevin M Dube
- Department of Pharmacy, Brigham and Women's Hospital, Boston, MA, USA
| | - Jeremy R DeGrado
- Department of Pharmacy, Brigham and Women's Hospital, Boston, MA, USA
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Abdul-Aziz MH, Driver E, Lipman J, Roberts JA. New paradigm for rapid achievement of appropriate therapy in special populations: coupling antibiotic dose optimization rapid microbiological methods. Expert Opin Drug Metab Toxicol 2018; 14:693-708. [PMID: 29865877 DOI: 10.1080/17425255.2018.1484452] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Some special patient populations (e.g. critically ill, burns, hematological malignancy, post-major surgery, post-major trauma) have characteristics that lead to higher rates of failure and mortality associated with infection. Choice of effective antibiotics and optimized doses are challenging in these patients that are commonly infected by multidrug-resistant pathogens. Areas covered: A review of the importance of diagnosis and the place of newer microbiological methods (e.g. whole-genome sequencing) to ensure rapid transition from empiric to directed antibiotic therapy is provided. The effects of pathophysiological changes on antibiotic pharmacokinetics are also provided. Expert opinion: Product information dosing regimens do not address the pharmacokinetic alterations that can occur in special patient populations and increase the likelihood of therapeutic failure and the emergence of bacterial resistance. Altered dosing approaches, supplemented with the use of dosing software and therapeutic drug monitoring, may be needed to ensure optimal antibiotic exposure and better therapeutic outcomes in these patients with severe infection. Dose optimization needs to be coupled with advanced microbiological techniques that enable rapid microbiological identification and characterization of resistance mechanism to ensure that maximally effective directed therapy can be chosen.
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Affiliation(s)
- Mohd H Abdul-Aziz
- a Faculty of Medicine , University of Queensland Centre for Clinical Research, The University of Queensland , Brisbane , Queensland , Australia
| | - Elicia Driver
- a Faculty of Medicine , University of Queensland Centre for Clinical Research, The University of Queensland , Brisbane , Queensland , Australia
| | - Jeffrey Lipman
- a Faculty of Medicine , University of Queensland Centre for Clinical Research, The University of Queensland , Brisbane , Queensland , Australia.,b Department of Intensive Care Medicine , Royal Brisbane and Women's Hospital , Brisbane , Queensland , Australia
| | - Jason A Roberts
- a Faculty of Medicine , University of Queensland Centre for Clinical Research, The University of Queensland , Brisbane , Queensland , Australia.,b Department of Intensive Care Medicine , Royal Brisbane and Women's Hospital , Brisbane , Queensland , Australia.,c Department of Pharmacy , Royal Brisbane and Women's Hospital , Brisbane , Queensland , Australia.,d School of Pharmacy, Centre for Translational Anti-infective Pharmacodynamics , The University of Queensland , Brisbane , Queensland , Australia
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Diep U, Chudow M, Sunjic KM. Pharmacokinetic Changes in Liver Failure and Impact on Drug Therapy. AACN Adv Crit Care 2018; 28:93-101. [PMID: 28592464 DOI: 10.4037/aacnacc2017948] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Uyen Diep
- Uyen Diep is Critical Care Clinical Pharmacist, Department of Pharmacy Services, Tampa General Hospital, Tampa, FL 33601 . Melissa Chudow is Assistant Professor, Department of Pharmacotherapeutics and Clinical Research, University of South Florida College of Pharmacy, Tampa, Florida. Katlynd M. Sunjic is Assistant Professor, Department of Pharmacotherapeutics and Clinical Research, University of South Florida College of Pharmacy, Tampa, Florida
| | - Melissa Chudow
- Uyen Diep is Critical Care Clinical Pharmacist, Department of Pharmacy Services, Tampa General Hospital, Tampa, FL 33601 . Melissa Chudow is Assistant Professor, Department of Pharmacotherapeutics and Clinical Research, University of South Florida College of Pharmacy, Tampa, Florida. Katlynd M. Sunjic is Assistant Professor, Department of Pharmacotherapeutics and Clinical Research, University of South Florida College of Pharmacy, Tampa, Florida
| | - Katlynd M Sunjic
- Uyen Diep is Critical Care Clinical Pharmacist, Department of Pharmacy Services, Tampa General Hospital, Tampa, FL 33601 . Melissa Chudow is Assistant Professor, Department of Pharmacotherapeutics and Clinical Research, University of South Florida College of Pharmacy, Tampa, Florida. Katlynd M. Sunjic is Assistant Professor, Department of Pharmacotherapeutics and Clinical Research, University of South Florida College of Pharmacy, Tampa, Florida
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41
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Masman AD, Tibboel D, Baar FPM, van Dijk M, Mathot RAA, van Gelder T. Prevalence and Implications of Abnormal Laboratory Results in Patients in the Terminal Phase of Life. J Palliat Med 2018; 19:822-9. [PMID: 27494223 DOI: 10.1089/jpm.2015.0548] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Pathophysiological changes at the end of life may affect pharmacokinetics of drugs. However, caregivers typically do not extensively monitor patients' laboratory parameters at the end of life. OBJECTIVE Our aim was to describe laboratory parameters of hospice patients in the week before death. METHODS A cohort study was conducted on available laboratory results in the week before death, including clinical chemistry and hematology tests. RESULTS Laboratory data of 125 patients in a palliative care center were included, assessed at a median of 3 days before death. Eighty percent of patients had anemia and almost all had hypoalbuminemia (97%). Elevated levels of gamma-glutamyl transferase (gGT) were found in 75%, of alkaline phosphatase (ALP) in 60%, of aspartate aminotransferase (ASAT) in 60%, and of calcium (Ca) in 68%. Alanine aminotransferase (ALAT), bilirubin, sodium (Na), and potassium (K) were abnormal in from 8.8% to 36.0% of patients. A previous unknown poor kidney function was found in 60% of patients. Thirteen patients (22%) with a regular morphine prescription and one patient treated with a non-steroidal anti-inflammatory drug (NSAID) had severe kidney failure. CONCLUSIONS Abnormal laboratory results were expected due to the pathophysiological changes that occur during the last phase of life. Remarkably, however, electrolytes (Na and K) were balanced even shortly before death. Estimated glomerular filtration rate (eGFR), reflecting the kidney function, seems the most clinically relevant laboratory parameter, because it may guide drug choice and dosing.
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Affiliation(s)
- Anniek D Masman
- 1 Palliative Care Centre , Laurens Cadenza, Rotterdam, the Netherlands .,2 Pain Expertise Centre, Erasmus MC-Sophia Children's Hospital , Rotterdam, the Netherlands
| | - Dick Tibboel
- 2 Pain Expertise Centre, Erasmus MC-Sophia Children's Hospital , Rotterdam, the Netherlands .,3 Intensive Care, Department of Paediatric Surgery, Erasmus MC-Sophia Children's Hospital , Rotterdam, the Netherlands
| | - Frans P M Baar
- 1 Palliative Care Centre , Laurens Cadenza, Rotterdam, the Netherlands .,2 Pain Expertise Centre, Erasmus MC-Sophia Children's Hospital , Rotterdam, the Netherlands
| | - Monique van Dijk
- 2 Pain Expertise Centre, Erasmus MC-Sophia Children's Hospital , Rotterdam, the Netherlands .,3 Intensive Care, Department of Paediatric Surgery, Erasmus MC-Sophia Children's Hospital , Rotterdam, the Netherlands
| | - Ron A A Mathot
- 4 Hospital Pharmacy-Clinical Pharmacology , Academic Medical Centre, Amsterdam, the Netherlands
| | - Teun van Gelder
- 5 Department of Hospital Pharmacy, Erasmus Medical Centre , Rotterdam, the Netherlands
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Zuppa AF, Curley MAQ. Sedation Analgesia and Neuromuscular Blockade in Pediatric Critical Care: Overview and Current Landscape. Pediatr Clin North Am 2017; 64:1103-1116. [PMID: 28941538 DOI: 10.1016/j.pcl.2017.06.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Sedation is a mainstay of therapy for critically ill children. Although necessary in the care of the critically ill child, sedative drugs are associated with adverse effects, such as disruption of circadian rhythm, altered sleep, delirium, potential neurotoxicity, and immunosuppression. Optimal approaches to the sedation of the critically ill child should include identification of sedation targets and sedation interruptions, allowing for a more individualized approach to sedation. Further research is needed to better understand the relationship between critical illness and sedation pharmacokinetics and pharmacodynamics, the impact of sedation on immune function, and the genetic implications on drug disposition and response.
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Affiliation(s)
- Athena F Zuppa
- Department of Pediatric Anesthesia and Critical Care Medicine, The Children's Hospital of Philadelphia, Center for Clinical Pharmacology, Colket Translational Research, Room 4008, 3614 Civic Center Boulevard, Philadelphia, PA 19104-4318, USA.
| | - Martha A Q Curley
- Anesthesia and Critical Care Medicine, School of Nursing, University of Pennsylvania, Claire M. Fagin Hall, 418 Curie Boulevard - #425, Philadelphia, PA 19104-4217, USA
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Ha MA, Sieg AC. Evaluation of Altered Drug Pharmacokinetics in Critically Ill Adults Receiving Extracorporeal Membrane Oxygenation. Pharmacotherapy 2017; 37:221-235. [DOI: 10.1002/phar.1882] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael A. Ha
- Surgical Intensive Care Unit; UMass Memorial Medical Center; Worcester Massachusetts
| | - Adam C. Sieg
- Heart Transplant/MCS; Gill Heart Institute; University of Kentucky; Lexington Kentucky
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Low Caspofungin Exposure in Patients in Intensive Care Units. Antimicrob Agents Chemother 2017; 61:AAC.01582-16. [PMID: 27855112 DOI: 10.1128/aac.01582-16] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 11/08/2016] [Indexed: 01/28/2023] Open
Abstract
In critically ill patients, drug exposure may be influenced by altered drug distribution and clearance. Earlier studies showed that the variability in caspofungin exposure was high in intensive care unit (ICU) patients. The primary objective of this study was to determine if the standard dose of caspofungin resulted in adequate exposure in critically ill patients. A multicenter prospective study in ICU patients with (suspected) invasive candidiasis was conducted in the Netherlands from November 2013 to October 2015. Patients received standard caspofungin treatment, and the exposure was determined on day 3 of treatment. An area under the concentration-time curve from 0 to 24 h (AUC0-24) of 98 mg · h/liter was considered adequate exposure. In case of low exposure (i.e., <79 mg · h/liter, a ≥20% lower AUC0-24), the caspofungin dose was increased and the exposure reevaluated. Twenty patients were included in the study, of whom 5 had a positive blood culture. The median caspofungin AUC0-24 at day 3 was 78 mg · h/liter (interquartile range [IQR], 69 to 97 mg · h/liter). A low AUC0-24 (<79 mg · h/liter) was seen in 10 patients. The AUC0-24 was significantly and positively correlated with the caspofungin dose in mg/kg/day (P = 0.011). The median AUC0-24 with a caspofungin dose of 1 mg/kg was estimated using a pharmacokinetic model and was 114.9 mg · h/liter (IQR, 103.2 to 143.5 mg · h/liter). In conclusion, the caspofungin exposure in ICU patients in this study was low compared with that in healthy volunteers and other (non)critically ill patients, most likely due to a larger volume of distribution. A weight-based dose regimen is probably more suitable for patients with substantially altered drug distribution. (This study has been registered at ClinicalTrials.gov under registration no. NCT01994096.).
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Veringa A, Ter Avest M, Span LFR, van den Heuvel ER, Touw DJ, Zijlstra JG, Kosterink JGW, van der Werf TS, Alffenaar JWC. Voriconazole metabolism is influenced by severe inflammation: a prospective study. J Antimicrob Chemother 2016; 72:261-267. [PMID: 27601292 DOI: 10.1093/jac/dkw349] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/19/2016] [Accepted: 07/26/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND During an infection or inflammation, several drug-metabolizing enzymes in the liver are down-regulated, including cytochrome P450 iso-enzymes. Since voriconazole is extensively metabolized by cytochrome P450 iso-enzymes, the metabolism of voriconazole can be influenced during inflammation via reduced clearance of the drug, resulting in higher voriconazole trough concentrations. OBJECTIVE To investigate prospectively the influence of inflammation on voriconazole metabolism and voriconazole trough concentrations. METHODS A prospective observational study was performed at the University Medical Center Groningen. Patients were eligible for inclusion if they were ≥18 years old and treated with voriconazole. Voriconazole and voriconazole-N-oxide concentrations were determined in discarded blood samples. To determine the degree of inflammation, C-reactive protein (CRP) concentrations were used. Subsequently, a longitudinal data analysis was performed to assess the effect of inflammation on the metabolic ratio and voriconazole trough concentration. RESULTS Thirty-four patients were included. In total 489 voriconazole trough concentrations were included in the longitudinal data analysis. This analysis showed that inflammation, reflected by CRP concentrations, significantly influenced the metabolic ratio, voriconazole trough concentration and voriconazole-N-oxide concentration (all P < 0.001), when corrected for other factors that could influence voriconazole metabolism. The metabolic ratio was decreased by 0.99229N and the voriconazole-N-oxide concentration by 0.99775N, while the voriconazole trough concentration was increased by 1.005321N, where N is the difference in CRP units (in mg/L). CONCLUSIONS This study shows that voriconazole metabolism is decreased during inflammation, resulting in higher voriconazole trough concentrations. Therefore, frequent monitoring of voriconazole serum concentrations is recommended during and following severe inflammation.
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Affiliation(s)
- Anette Veringa
- University Medical Center Groningen, Department of Clinical Pharmacy and Pharmacology, University of Groningen, Groningen, the Netherlands
| | - Mendy Ter Avest
- University Medical Center Groningen, Department of Clinical Pharmacy and Pharmacology, University of Groningen, Groningen, the Netherlands
| | - Lambert F R Span
- University Medical Center Groningen, Department of Hematology, University of Groningen, Groningen, the Netherlands
| | - Edwin R van den Heuvel
- Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Daan J Touw
- University Medical Center Groningen, Department of Clinical Pharmacy and Pharmacology, University of Groningen, Groningen, the Netherlands
| | - Jan G Zijlstra
- University Medical Center Groningen, Department of Critical Care, University of Groningen, Groningen, the Netherlands
| | - Jos G W Kosterink
- University Medical Center Groningen, Department of Clinical Pharmacy and Pharmacology, University of Groningen, Groningen, the Netherlands.,University of Groningen, Department of Pharmacy, Section of Pharmacotherapy and Pharmaceutical Care, Groningen, the Netherlands
| | - Tjip S van der Werf
- University Medical Center Groningen, Department of Internal Medicine, University of Groningen, Groningen, the Netherlands.,University Medical Center Groningen, Department of Pulmonary Diseases and Tuberculosis, University of Groningen, Groningen, the Netherlands
| | - Jan-Willem C Alffenaar
- University Medical Center Groningen, Department of Clinical Pharmacy and Pharmacology, University of Groningen, Groningen, the Netherlands
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Regueira T. CONSIDERACIONES FARMACOLÓGICAS GENERALES Y PARTICULARES EN CUIDADOS INTENSIVOS. REVISTA MÉDICA CLÍNICA LAS CONDES 2016. [DOI: 10.1016/j.rmclc.2016.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Atkinson HC, Stanescu I, Frampton C, Salem II, Beasley CPH, Robson R. Pharmacokinetics and Bioavailability of a Fixed-Dose Combination of Ibuprofen and Paracetamol after Intravenous and Oral Administration. Clin Drug Investig 2016; 35:625-32. [PMID: 26334726 PMCID: PMC4579261 DOI: 10.1007/s40261-015-0320-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background and Objectives Previously published studies have suggested the lack of a
pharmacokinetic interaction between ibuprofen and paracetamol when they are delivered as a fixed-dose oral combination. The aim of this study was to determine the pharmacokinetic profile and safety of a fixed-dose intravenous (IV) combination, containing 3 mg/mL ibuprofen and 10 mg/mL paracetamol, in comparison with its individual components. The study also assessed the relative bioavailability of the same doses of the active ingredients when they were administered as an oral formulation. Methods A single-dose, open-label, randomized, five-period cross-over sequence pharmacokinetic study was undertaken in 30 healthy volunteers. Serial plasma samples were assayed for both paracetamol and ibuprofen concentrations, using validated liquid chromatography–tandem mass spectrometry methods. Pharmacokinetic parameters were computed using standard non-compartmental analyses. Adverse events were also assessed. The ratios of the maximum measured plasma concentration (Cmax), the area under the plasma concentration–time curve (AUC) from time zero to the time of the last measurable plasma concentration (AUCt) and AUC from time zero to infinity (AUC∞) were analysed for bioequivalence as determined by 90 % confidence intervals. Results The pharmacokinetic parameters of ibuprofen and paracetamol were very similar for the combination and monotherapy IV preparations; the ratios of the Cmax, AUCt and AUC∞ values fell within the 80–125 % acceptable bioequivalence range. Precise dose proportionality for both compounds was also determined for the half dose of the IV formulation in comparison with the full dose. The relative bioavailability of paracetamol (93.78 %) and ibuprofen (96.45 %) confirmed the pharmacokinetic equivalence of the oral and IV formulations of the fixed-dose combination. Conclusion Concomitant administration of 3 mg/mL ibuprofen and 10 mg/mL paracetamol in a fixed-dose IV combination does not alter the pharmacokinetic profiles of either drug. The IV and oral dose forms of such a combination are pharmacokinetically equivalent.
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Affiliation(s)
- Hartley C Atkinson
- AFT Pharmaceuticals Ltd, PO Box 33203, Takapuna, Auckland, 0740, New Zealand
| | - Ioana Stanescu
- AFT Pharmaceuticals Ltd, PO Box 33203, Takapuna, Auckland, 0740, New Zealand
| | - Chris Frampton
- University of Otago, PO Box 4345, Christchurch, 8140, New Zealand
| | - Isam I Salem
- International Pharmaceutical Research Centre, 1 Queen Rania Street-Sport City Circle, Amman, 11196, Jordan
| | - Charles P H Beasley
- AFT Pharmaceuticals Ltd, PO Box 33203, Takapuna, Auckland, 0740, New Zealand.
| | - Richard Robson
- Christchurch Clinical Studies Trust Ltd, PO Box 2856, Christchurch, 8140, New Zealand.
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Abstract
Critical illness is accompanied by multiple physiologic alterations that affect the pharmacokinetics of antimicrobials. Although the pharmacokinetics of a number of antimicrobials have been studied in critically ill individuals, an understanding of the physiological alterations in critical illness and general pharmacokinetic principles of antimicrobials is imperative for appropriate selection, dosing, and prediction of toxicity.
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Affiliation(s)
- Aaron M. Cook
- Neurosurgery/Critical Care, University of Kentucky Chandler Medical Center, Lexington,
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49
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Marsot A, Guilhaumou R, Riff C, Blin O. Amikacin in Critically Ill Patients: A Review of Population Pharmacokinetic Studies. Clin Pharmacokinet 2016; 56:127-138. [DOI: 10.1007/s40262-016-0428-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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50
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Aoyama T, Hirata K, Yamamoto Y, Yokota H, Hayashi H, Aoyama Y, Matsumoto Y. Semi-mechanistic autoinduction model of midazolam in critically ill patients: population pharmacokinetic analysis. J Clin Pharm Ther 2016; 41:392-8. [PMID: 27178380 DOI: 10.1111/jcpt.12395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 04/05/2016] [Indexed: 11/28/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Midazolam (MDZ) is commonly used for sedating critically ill patients. The daily dose required for adequate sedation increases in increments over 100 h after administration. The objectives of this study were to characterize the MDZ pharmacokinetics in critically ill patients and to describe the phenomenon of increasing daily dose by means of population pharmacokinetic analysis. METHODS Data were obtained from 30 patients treated in an intensive care unit. The patients received MDZ intravenously as a combination of bolus and continuous infusion. Serum MDZ concentration was assayed by high-performance liquid chromatography. Population pharmacokinetic analysis was performed using the NONMEM software package. The alteration of clearance unexplained by demographic factors and clinical laboratory data was described as an autoinduction of MDZ clearance using a semi-mechanistic pharmacokinetic-enzyme turnover model. RESULTS AND DISCUSSION The final population pharmacokinetic model was a one-compartment model estimated by incorporating a semi-mechanistic pharmacokinetic-enzyme turnover model for clearance, taking autoinduction into account. A significant covariate for MDZ clearance was total bilirubin. An increase in total bilirubin indicated a reduction in MDZ clearance. From simulation using the population pharmacokinetic parameters obtained in this study, MDZ clearance increased 2·3 times compared with pre-induced clearance 100 h after the start of 12·5 mg/h continuous infusion. WHAT IS NEW AND CONCLUSION Autoinduction and total bilirubin were significant predictors of the clearance of MDZ in this population. Step-by-step dosage adjustment using this population pharmacokinetic model may be useful for establishing a MDZ dosage regimen in critically ill patients.
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Affiliation(s)
- T Aoyama
- Laboratory of Clinical Pharmacokinetics, School of Pharmacy, Nihon University, Chiba, Japan
| | - K Hirata
- Department of Pharmacy, Fureai Higashitotsuka Hospital, Yokohama, Japan
| | - Y Yamamoto
- Department of Emergency and Critical Care Medicine, Nippon Medical School Hospital, Tokyo, Japan
| | - H Yokota
- Department of Emergency and Critical Care Medicine, Nippon Medical School Hospital, Tokyo, Japan
| | - H Hayashi
- Laboratory of Pharmacotherapy, School of Pharmacy, Nihon University, Chiba, Japan
| | - Y Aoyama
- Laboratory of Clinical Pharmacokinetics, School of Pharmacy, Nihon University, Chiba, Japan.,Second Department of Anesthesiology, Toho University School of Medicine, Tokyo, Japan
| | - Y Matsumoto
- Laboratory of Clinical Pharmacokinetics, School of Pharmacy, Nihon University, Chiba, Japan
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