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Edwards SR, Blough BE, Cowart K, Howell GH, Araujo AA, Haskell JP, Huskinson SL, Rowlett JK, Brackeen MF, Freeman KB. Assessment of the antinociceptive, respiratory-depressant, and reinforcing effects of the low pK a fluorinated fentanyl analogs, FF3 and NFEPP. Neuropharmacology 2024; 255:110002. [PMID: 38754577 PMCID: PMC11195011 DOI: 10.1016/j.neuropharm.2024.110002] [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] [Received: 10/16/2023] [Revised: 05/12/2024] [Accepted: 05/13/2024] [Indexed: 05/18/2024]
Abstract
RATIONALE Recent studies report that fentanyl analogs with relatively low pKa values produce antinociception in rodents without other mu opioid-typical side effects due to the restriction of their activity to injured tissue with relatively low pH values. However, it is unclear if and to what degree these compounds may produce mu opioid-typical side effects (respiratory depression, reinforcing effects) at doses higher than those required to produce antinociception. OBJECTIVES The present study compared the inflammatory antinociceptive, respiratory-depressant, and reinforcing effects of fentanyl and two analogs of intermediate (FF3) and low (NFEPP) pKa values in terms of potency and efficacy in male and female Sprague-Dawley rats. METHODS Nociception was produced by administration of Complete Freund's Adjuvant into the hind paw of subjects, and antinociception was measured using an electronic Von Frey test. Respiratory depression was measured using whole-body plethysmography. Reinforcing effects were measured in self-administration using a progressive-ratio schedule of reinforcement. The dose ranges tested for each drug encompassed no effect to maximal effects. RESULTS All compounds produced full effects in all measures but varied in potency. FF3 and fentanyl were equipotent in antinociception and self-administration, but FF3 was less potent than fentanyl in respiratory depression. NFEPP was less potent than fentanyl in every measure. The magnitude of potency difference between antinociception and other effects was greater for FF3 than for NFEPP or fentanyl, indicating that FF3 had the widest margin of safety when relating antinociception to respiratory-depressant and reinforcing effects. CONCLUSIONS Low pKa fentanyl analogs possess potential as safer analgesics, but determining the optimal degree of difference for pKa relative to fentanyl will require further study due to some differences between the current results and findings from prior work with these analogs.
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Affiliation(s)
- Shelley R Edwards
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, 39216, USA; School of Medicine, University of Mississippi Medical Center, Jackson, MS, 39216, USA.
| | - Bruce E Blough
- RTI International, Research Triangle Park, NC, 27709, USA
| | - Kristian Cowart
- Utrecht University, Heidelberglaan 8, 3548, CS, Utrecht, the Netherlands
| | - Grace H Howell
- School of Medicine, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Aaron A Araujo
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Jacob P Haskell
- Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Sally L Huskinson
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, 39216, USA; Center for Innovation and Discovery in Addiction, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - James K Rowlett
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, 39216, USA; Center for Innovation and Discovery in Addiction, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | | | - Kevin B Freeman
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, 39216, USA; Center for Innovation and Discovery in Addiction, University of Mississippi Medical Center, Jackson, MS, 39216, USA
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Poeran J, Memtsoudis SG. Non-steroidal anti-inflammatory drugs in multimodal strategies: a potential double-edged sword but still more research needed. Anaesthesia 2024; 79:680-684. [PMID: 38502825 DOI: 10.1111/anae.16284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2024] [Indexed: 03/21/2024]
Affiliation(s)
- J Poeran
- Critical Care and Pain Management, Hospital for Special Surgery, New York, NY, USA
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - S G Memtsoudis
- Critical Care and Pain Management, Hospital for Special Surgery, New York, NY, USA
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Paice JA, Bohlke K, Barton D, Craig DS, El-Jawahri A, Hershman DL, Kong LR, Kurita GP, LeBlanc TW, Mercadante S, Novick KLM, Sedhom R, Seigel C, Stimmel J, Bruera E. Use of Opioids for Adults With Pain From Cancer or Cancer Treatment: ASCO Guideline. J Clin Oncol 2023; 41:914-930. [PMID: 36469839 DOI: 10.1200/jco.22.02198] [Citation(s) in RCA: 45] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To provide guidance on the use of opioids to manage pain from cancer or cancer treatment in adults. METHODS A systematic review of the literature identified systematic reviews and randomized controlled trials of the efficacy and safety of opioid analgesics in people with cancer, approaches to opioid initiation and titration, and the prevention and management of opioid adverse events. PubMed and the Cochrane Library were searched from January 1, 2010, to February 17, 2022. American Society of Clinical Oncology convened an Expert Panel to review the evidence and formulate recommendations. RESULTS The evidence base consisted of 31 systematic reviews and 16 randomized controlled trials. Opioids have primarily been evaluated in patients with moderate-to-severe cancer pain, and they effectively reduce pain in this population, with well-characterized adverse effects. Evidence was limited for several of the questions of interest, and the Expert Panel relied on consensus for these recommendations or noted that no recommendation could be made at this time. RECOMMENDATIONS Opioids should be offered to patients with moderate-to-severe pain related to cancer or active cancer treatment unless contraindicated. Opioids should be initiated PRN (as needed) at the lowest possible dose to achieve acceptable analgesia and patient goals, with early assessment and frequent titration. For patients with a substance use disorder, clinicians should collaborate with a palliative care, pain, and/or substance use disorder specialist to determine the optimal approach to pain management. Opioid adverse effects should be monitored, and strategies are provided for prevention and management.Additional information is available at www.asco.org/supportive-care-guidelines.
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Affiliation(s)
- Judith A Paice
- Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Kari Bohlke
- American Society of Clinical Oncology, Alexandria, VA
| | - Debra Barton
- University of Michigan School of Nursing, Ann Arbor, MI
| | - David S Craig
- H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | | | - Dawn L Hershman
- Mailman School of Public Health and Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, NY
| | - Lynn R Kong
- Ventura County Hematology Oncology Specialists, Oxnard, CA
| | - Geana P Kurita
- Rigshospitalet Copenhagen University Hospital, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Kristina L M Novick
- Penn Radiation Oncology Chester County, Chester County Hospital, West Chester, PA
| | - Ramy Sedhom
- Penn Center for Cancer Care Innovation, Abramson Cancer Center, Penn Medicine, Philadelphia, PA
| | | | | | - Eduardo Bruera
- The University of Texas MD Anderson Cancer Center, Houston, TX
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Noble BN, Izumi S, Tjia J, Ku IY, Kadoyama KL, McPherson ML, Furuno JP. Patient and Family Participation in Medication Decisions on Discharge to Hospice Care. J Palliat Med 2022; 25:1790-1794. [PMID: 35649207 PMCID: PMC9784578 DOI: 10.1089/jpm.2021.0630] [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] [Accepted: 04/21/2022] [Indexed: 01/04/2023] Open
Abstract
Background: High-quality hospice care is characterized by patient-centered care and shared decision making between patients, families, and health care workers. However, little is known regarding the frequency and characteristics of patient and family participation in medication decisions on transition to hospice care. Objective: To quantify the frequency and characteristics of patient and/or family participation in medication decisions. Subjects: Adult (age ≥18 years) patients discharged from Oregon Health & Science University Hospital (OHSU) to hospice care between January 1, 2010 and December 31, 2016. Design: Cross-sectional study. Measures: The primary outcome was documented patient and/or family participation. Patient or family participation was defined as documentation of patient or family member discussion surrounding medication decisions in the discharge summary. We used logistic regression to identify patient and admission characteristics associated with documentation of patient or family member participation in medication decisions. Results: Among 348 eligible patients, patient and/or family participation was documented in 22% of discharges to hospice care. Higher Charlson comorbidity index (adjusted odds ratio [aOR]: 1.09, 95% confidence interval [CI]: 1.01-1.17) and having a diagnosis of cancer (aOR: 1.99, 95% CI: 1.16-3.43) were associated with an increased documentation of patient or family member participation in medication decisions. Patients admitted to the intensive care unit were less likely to have patient/family member participation (aOR: 0.55, 95% CI: 0.32-0.94). Having a specialty palliative care consultation was not significantly associated with patient or family member participation in medication decisions (aOR: 0.77, 95% CI: 0.40-1.48). Conclusions: Patient or family participation in medication decisions was documented for only 22% patients on discharge to hospice care. Opportunities to improve participation likely include increasing knowledge and capacity regarding primary palliative care for all clinicians and implementation of specialized interventions for patients and families transitioning to hospice care from acute care settings.
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Affiliation(s)
- Brie N. Noble
- Department of Pharmacy Practice, Oregon State University College of Pharmacy, Portland, Oregon, USA
| | - Shigeko Izumi
- Oregon Health & Science University School of Nursing, Portland, Oregon, USA
| | - Jennifer Tjia
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - In Young Ku
- Department of Pharmacy Practice, Oregon State University College of Pharmacy, Portland, Oregon, USA
| | - Kirsten L. Kadoyama
- Department of Pharmacy Practice, Oregon State University College of Pharmacy, Portland, Oregon, USA
| | - Mary Lynn McPherson
- Department of Pharmacy Practice and Science, University of Maryland School of Pharmacy, Baltimore, Maryland, USA
| | - Jon P. Furuno
- Department of Pharmacy Practice, Oregon State University College of Pharmacy, Portland, Oregon, USA
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Minard LV, Fisher J, Broadfield L, Walsh G, Sketris I. Opioid Use at End-Of-Life Among Nova Scotia Patients With Cancer. Front Pharmacol 2022; 13:836864. [PMID: 35401210 PMCID: PMC8987150 DOI: 10.3389/fphar.2022.836864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 02/07/2022] [Indexed: 11/18/2022] Open
Abstract
Purpose: To determine the factors associated with opioid analgesic prescriptions as measured by community pharmacy dispensations to all Nova Scotia (NS) patients with cancer at end-of-life from 2005 to 2009. Methods: The NS Cancer Registry and the NS Prescription Monitoring Program (NSPMP) were used to link Nova Scotians who had a cancer diagnosis and received a prescription for opioids in their last year of life (n = 6,186) from 2005 to 2009. The association of factors with opioid dispensations at end-of-life were determined (e.g., patient demographics, type of prescriber, type of cancer, and opioid type, formulation, and dose). Results: Almost 54% (n = 6,186) of the end-of-life study population with cancer (n = 11,498) was linked to the NSPMP and therefore dispensed opioids. Most prescriptions were written by general practitioners (89%) and were for strong opioids (81%). Immediate-release formulations were more common than modified-release formulations. Although the annual average parenteral morphine equivalents (MEQ) did not change during the study period, the number of opioid prescriptions per patient per year increased from 5.9 in 2006 to 7.0 in 2009 (p < 0.0001). Patients age 80 and over received the fewest prescriptions (mean 3.9/year) and the lowest opioid doses (17.0 MEQ) while patients aged 40–49 received the most prescriptions (mean 14.5/year) and the highest doses of opioid (80.2 MEQ). Conclusion: Our study examined opioid analgesic use at end-of-life in patients with cancer for a large real-world population and determined factors, trends and patterns associated with type and dose of opioid dispensed. We provide information regarding how general practitioners prescribe opioid therapy to patients at end-of-life. Our data suggest that at the time of this study, there may have been under-prescribing of opioids to patients with cancer at end-of-life. This information can be used to increase awareness among general practitioners, and to inform recommendations from professional regulatory bodies, to aid in managing pain for cancer patients at end-of-life. Future work could address how opioid prescribing has changed over time, and whether efforts to reduce opioid prescribing in response to the opioid crisis have affected patients with cancer at end-of-life in Nova Scotia.
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Affiliation(s)
- Laura V. Minard
- College of Pharmacy, Dalhousie University, Halifax, NS, Canada
| | - Judith Fisher
- Nova Scotia Department of Health and Wellness, Halifax, NS, Canada
| | | | - Gordon Walsh
- Nova Scotia Health Cancer Care Program, Halifax, NS, Canada
| | - Ingrid Sketris
- College of Pharmacy, Dalhousie University, Halifax, NS, Canada
- *Correspondence: Ingrid Sketris, mailto:
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