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Dubois C, Bobitt J, Ding L, Eurich DT, Knapp AA, Jordan N. The Association of Medical Cannabis Use with Pain Levels and Opioid Use in Illinois' Opioid Alternative Pilot Program. Subst Use Misuse 2024; 59:1785-1796. [PMID: 39069737 DOI: 10.1080/10826084.2024.2383585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
OBJECTIVE The state of Illinois' Opioid Alternative Pilot Program (OAPP) is the first and only official harm-reduction program in the US to address the opioid crisis via facilitation of safe and legal access to medical cannabis. This study evaluates the association of medical cannabis use with pain level and frequency of opioid use in the first cohort of OAPP participants in 2019. METHODS A survey was sent OAPP enrollees between February and July 2019. Cannabis users (n = 626) were compared to non-users (n = 234) to determine whether there was an association between cannabis use and self-reported (a) pain level and (b) frequency of opioid use. Backward stepwise regression models were used. RESULTS A total of 860 participants was included in the analysis. Overall, 75% of the study sample reported pain as their primary medical symptom, and 67% of cannabis users reported having a disability. The mean difference in pain level between cannabis users and non-users was 4.5 units (on a 100-point scale) higher among cannabis users than non-users (p = 0.03); and cannabis use was statistically associated with pain level. High-frequency opioid users had lower odds of reporting cannabis use within the past year than low/no opioid users. CONCLUSIONS Although there was a statistical association between cannabis use and pain, the difference of 4.5 points in pain level between users and non-users was too small to reflect a clinically meaningful relative difference. This study may provide useful information to providers and clinicians about how the OAPP and similar programs may reduce opioid use and improve health outcomes.
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Affiliation(s)
- Cerina Dubois
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- School of Public Health, University of Alberta, Edmonton, AB, Canada
| | - Julie Bobitt
- Center for Dissemination and Implementation Science, University of Illinois College of Medicine, Chicago, IL, USA
| | - Lei Ding
- Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, AB, Canada
| | - Dean T Eurich
- School of Public Health, University of Alberta, Edmonton, AB, Canada
| | - Ashley A Knapp
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Neil Jordan
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Center of of Innovation for Complex Chronic Healthcare, Hines VA Hospital, Hines, IL, USA
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Dubois C, Fernandes H, Lin M, Martins KJB, Dyck JRB, Klarenbach SW, Richer L, Jess E, Hanlon JG, Hyshka E, Eurich DT. Benzodiazepine use in medical cannabis authorization adult patients from 2013 to 2021: Alberta, Canada. BMC Public Health 2024; 24:859. [PMID: 38504198 PMCID: PMC10953249 DOI: 10.1186/s12889-024-18356-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 03/14/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND Benzodiazepines are a class of medications that are being frequently prescribed in Canada but carry significant risk of harm. There has been increasing clinical interest on the potential "sparing effects" of medical cannabis as one strategy to reduce benzodiazepine use. The objective of this study as to examine the association of medical cannabis authorization with benzodiazepine usage between 2013 and 2021 in Alberta, Canada. METHODS A propensity score matched cohort study with patients on regular benzodiazepine treatment authorized to use medical cannabis compared to controls who do not have authorization for medical cannabis. A total of 9690 medically authorized cannabis patients were matched to controls. To assess the effect of medical cannabis use on daily average diazepam equivalence (DDE), interrupted time series (ITS) analysis was used to assess the change in the trend of DDE in the 12 months before and 12 months after the authorization of medical cannabis. RESULTS Over the follow-up period after medical cannabis authorization, there was no overall change in the DDE use in authorized medical cannabis patients compared to matched controls (- 0.08 DDE, 95% CI: - 0.41 to 0.24). Likewise, the sensitivity analysis showed that, among patients consuming ≤5 mg baseline DDE, there was no change immediately after medical cannabis authorization compared to controls (level change, - 0.04 DDE, 95% CI: - 0.12 to 0.03) per patient as well as in the month-to-month trend change (0.002 DDE, 95% CI: - 0.009 to 0.12) per patient was noted. CONCLUSIONS This short-term study found that medical cannabis authorization had minimal effects on benzodiazepine use. Our findings may contribute ongoing evidence for clinicians regarding the potential impact of medical cannabis to reduce benzodiazepine use. HIGHLIGHTS • Medical cannabis authorization had little to no effect on benzodiazepine usage among patients prescribed regular benzodiazepine treatment in Alberta, Canada. • Further clinical research is needed to investigate the potential impact of medical cannabis as an alternative to benzodiazepine medication.
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Affiliation(s)
- Cerina Dubois
- School of Public Health, University of Alberta, 3-300 Edmonton Clinic Health Academy 11405 - 87 Ave Edmonton, AB, T6G 1C9 2E, Edmonton, AB, Canada
| | - Heidi Fernandes
- School of Public Health, University of Alberta, 3-300 Edmonton Clinic Health Academy 11405 - 87 Ave Edmonton, AB, T6G 1C9 2E, Edmonton, AB, Canada
| | - Mu Lin
- SPOR (Strategy for Patient Oriented Research) Data Platform, Alberta Health Services, Edmonton, Alberta, Canada
| | - Karen J B Martins
- Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Jason R B Dyck
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Scott W Klarenbach
- Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Lawrence Richer
- Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Ed Jess
- College of Physicians & Surgeons of Alberta, Edmonton, Alberta, Canada
| | - John G Hanlon
- St. Michael's Hospital Department of Anesthesia, University of Toronto, Ontario, Canada
- Department of Anaesthesiology and Pain Medicine, University of Toronto, Ontario, Canada
| | - Elaine Hyshka
- School of Public Health, University of Alberta, 3-300 Edmonton Clinic Health Academy 11405 - 87 Ave Edmonton, AB, T6G 1C9 2E, Edmonton, AB, Canada
| | - Dean T Eurich
- School of Public Health, University of Alberta, 3-300 Edmonton Clinic Health Academy 11405 - 87 Ave Edmonton, AB, T6G 1C9 2E, Edmonton, AB, Canada.
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Herdegen T, Cascorbi I. Drug Interactions of Tetrahydrocannabinol and Cannabidiol in Cannabinoid Drugs. DEUTSCHES ARZTEBLATT INTERNATIONAL 2023; 120:833-840. [PMID: 37874128 PMCID: PMC10824494 DOI: 10.3238/arztebl.m2023.0223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 09/28/2023] [Accepted: 09/28/2023] [Indexed: 10/25/2023]
Abstract
BACKGROUND Cannabinoid drugs containing tetrahydrocannabinol (THC), or its structural analogues, as monotherapeutic agents or as extracts or botanical preparations with or without cannabidiol (CBD) are often prescribed to multimorbid patients who are taking multiple drugs. This raises the question of the risk of drug interactions. METHODS This review of the pharmacokinetics and pharmacodynamics of interactions with cannabinoid drugs and their potential effects is based on pertinent publications retrieved by a selective literature search. RESULTS As THC and CBD are largely metabolized in the liver, their bioavailability after oral or oral-mucosal administration is low (6-8% and 11-13%, respectively). The plasma concentrations of THC and its active metabolite 11-OH-THC can be increased by strong CYP3A4 inhibitors (verapamil, clarithromycin) and decreased by strong CYP3A4 inductors (rifampicin, carbamazepine). The clinical significance of these effects is unclear because of the variable plasma level and therapeutic spectrum of THC. The metabolism of CBD is less dependent on cytochrome P450 enzymes than that of THC. THC and CBD inhibit CYP2C and CYP3A4; the corresponding clinically relevant drug interactions probably are likely to arise only with THC doses above 30 mg/day and CBD doses above 300 mg/day. CONCLUSION Potential drug interactions with THC and CBD are probably of little importance at low or moderate doses. Strong CYP inhibitors or inductors can intensify or weaken their effect. Slowly ramping up the dose of oral cannabinoid drugs can lessen their pharmacodynamic interactions, which can generally be well controlled. Administration by inhalation can worsen the interactions.
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Affiliation(s)
- Thomas Herdegen
- Institute of Experimental and Clinical Pharmacology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Ingolf Cascorbi
- Institute of Experimental and Clinical Pharmacology, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
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Lee C, Danielson EC, Beestrum M, Eurich DT, Knapp A, Jordan N. Medical Cannabis and Its Efficacy/Effectiveness for the Treatment of Low-Back Pain: a Systematic Review. Curr Pain Headache Rep 2023; 27:821-835. [PMID: 38041708 PMCID: PMC11095816 DOI: 10.1007/s11916-023-01189-0] [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: 11/08/2023] [Indexed: 12/03/2023]
Abstract
PURPOSE OF REVIEW This systematic review aims to inform the current state of evidence about the efficacy and effectiveness of medical cannabis use for the treatment of LBP, specifically on pain levels and overall opioid use for LBP. Searches were conducted in MEDLINE (PubMed), Embase, and CINAHL. The search was limited to the past 10 years (2011-2021). Study inclusion was determined by the critical appraisal process using the Joanna Briggs Institute framework. Only English language articles were included. Participant demographics included all adult individuals with LBP who were prescribed medical cannabis for LBP and may be concurrently using opioids for their LBP. Study quality and the risk of bias were both evaluated. A narrative synthesis approach was used. RECENT FINDINGS A total of twelve studies were included in the synthesis: one randomized controlled trial (RCT), six observational studies (one prospective, four retrospective, and one cross-over), and five case studies. All study results, except for the RCT, indicated a decrease in LBP levels or opioid use over time after medical cannabis use. The RCT reported no statistically significant difference in LBP between cannabis and placebo groups. Low back pain (LBP) affects 568 million people worldwide. In the United States, LBP treatment represents more than half of regular opioid users. With the opioid epidemic, alternative methods, particularly medical cannabis, is now increasingly sought by practicing physicians and patients. Due to its infancy, there is minimal high-quality evidence to support medical cannabis use as a first line treatment for LBP.
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Affiliation(s)
- Cerina Lee
- Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
- School of Public Health, University of Alberta, Edmonton, AB, Canada.
| | - Elizabeth C Danielson
- Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Molly Beestrum
- Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Dean T Eurich
- School of Public Health, University of Alberta, Edmonton, AB, Canada
| | - Ashley Knapp
- Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Neil Jordan
- Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Center of Innovation for Complex Chronic Healthcare, Hines VA Hospital, Hines, IL, USA
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Nguyen T, Li Y, Greene D, Stancliff S, Quackenbush N. Changes in Prescribed Opioid Dosages Among Patients Receiving Medical Cannabis for Chronic Pain, New York State, 2017-2019. JAMA Netw Open 2023; 6:e2254573. [PMID: 36716026 PMCID: PMC9887491 DOI: 10.1001/jamanetworkopen.2022.54573] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
IMPORTANCE Patients with chronic pain often receive long-term opioid therapy (LOT), which places them at risk of opioid use disorder and overdose. This presents the need for alternative or companion treatments; however, few studies on the association of medical cannabis (MC) with reducing opioid dosages exist. OBJECTIVE To assess changes in opioid dosages among patients receiving MC for longer duration compared with shorter duration. DESIGN, SETTING, AND PARTICIPANTS This cohort study of New York State Prescription Monitoring Program data from 2017 to 2019 included patients receiving MC for chronic pain while also receiving opioid treatment. Of these, patients receiving LOT prior to receiving MC were selected. Individuals were studied for 8 months after starting MC. Data were analyzed from November 2021 to February 2022. EXPOSURES Selected patients were divided into 2 groups based on the duration of receiving MC: the nonexposure group received MC for 30 days or fewer, and the exposure group received MC for more than 30 days. MAIN OUTCOMES AND MEASURES The main outcome was opioid dosage, measured by mean daily morphine milligram equivalent (MME). Analyses were conducted for 3 strata by opioid dosage prior to receiving MC: MME less than 50, MME of 50 to less than 90, and MME of 90 or greater. RESULTS A total of 8165 patients were included, with 4041 (median [IQR] age, 57 [47-65] years; 2376 [58.8%] female) in the exposure group and 4124 (median [IQR] age, 54 (44-62) years; 2370 [57.5%] female) in the nonexposure group. Median (IQR) baseline MMEs for the exposure vs nonexposure groups were 30.0 (20.0-40.0) vs 30.0 (20.0-40.0) in the lowest stratum, 60.0 (60.0-70.0) vs 60.0 (60.0-90.0) in the middle stratum, and 150.0 (100.0-216.2) vs 135.0 (100.0-218.0) in the highest stratum. During follow-up, significantly greater reductions in opioid dosage were observed among the exposure group. A dose-response association of patients' opioid dosage at baseline was observed with the differences in the monthly MME reductions between exposure and nonexposure groups, with a difference of -1.52 (95% CI, -1.67 to -1.37) MME for the lowest stratum, -3.24 (95% CI, -3.61 to -2.87) MME for the middle stratum, and -9.33 (95% CI, -9.89 to -8.77) MME for the highest stratum. The daily MME for the last month of the follow-up period among patients receiving longer MC was reduced by 48% in the lowest stratum, 47% in the middle stratum, and 51% in the highest stratum compared with the baseline dosages. Among individuals in the nonexposure group, daily MME was reduced by only 4% in the lowest stratum, 9% in the middle stratum, and 14% in the highest stratum. CONCLUSIONS AND RELEVANCE In this cohort study of patients receiving LOT, receiving MC for a longer duration was associated with reductions in opioid dosages, which may lower their risk of opioid-related morbidity and mortality.
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Affiliation(s)
- Trang Nguyen
- New York State Department of Health, Albany
- Department of Epidemiology and Biostatistics, University at Albany School of Public Health, Rensselaer, New York
| | - Yunshu Li
- New York State Department of Health, Albany
- Department of Epidemiology and Biostatistics, University at Albany School of Public Health, Rensselaer, New York
| | - Danielle Greene
- City University of New York Graduate School of Public Health and Health Policy, New York, New York
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Eichorn NL, Shult HT, Kracht KD, Berlau DJ. Making a joint decision: Cannabis as a potential substitute for opioids in obstetrics and gynecology. Best Pract Res Clin Obstet Gynaecol 2022; 85:59-67. [PMID: 35970747 DOI: 10.1016/j.bpobgyn.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 07/12/2022] [Indexed: 12/14/2022]
Abstract
There is a growing body of evidence that cannabis may be effective as an analgesic with potential to reduce opioid usage in chronic pain. This review synthesizes the available literature to elucidate the possible role that cannabis might play in reducing opioid use in gynecological disorders that may potentially lead to a recommendation of substituting opioids with cannabis. With reports of a decrease in opioid use after cannabis initiation, an opioid-sparing effect has been seen in gynecologic malignancies such as ovarian, uterine, endometrial, and cervical cancers, in addition to chronic pelvic pain (CPP). Though many studies have found an association between cannabis and various adverse maternal and neonatal outcomes, there is a lack of randomized controlled trials making it difficult to claim a directly causal relationship between cannabis and these adverse outcomes. Additionally, with increased use of cannabis during pregnancy, the evidence of possible benefits and risks to mothers and fetuses is examined.
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Affiliation(s)
- Nicole L Eichorn
- Departent of Pharmaceutical Sciences, Regis University School of Pharmacy, 3333 Regis Blvd. H-28, Denver, CO, 80221, USA
| | - Hannah T Shult
- Departent of Pharmaceutical Sciences, Regis University School of Pharmacy, 3333 Regis Blvd. H-28, Denver, CO, 80221, USA
| | - Kelsie D Kracht
- Departent of Pharmaceutical Sciences, Regis University School of Pharmacy, 3333 Regis Blvd. H-28, Denver, CO, 80221, USA
| | - Daniel J Berlau
- Departent of Pharmaceutical Sciences, Regis University School of Pharmacy, 3333 Regis Blvd. H-28, Denver, CO, 80221, USA.
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Characterizing anxiety, pain, sleep, and quality of life among patients in a state Medical Marijuana Program. Complement Ther Clin Pract 2022; 48:101612. [DOI: 10.1016/j.ctcp.2022.101612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 05/09/2022] [Accepted: 05/29/2022] [Indexed: 11/17/2022]
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McDonagh MS, Morasco BJ, Wagner J, Ahmed AY, Fu R, Kansagara D, Chou R. Cannabis-Based Products for Chronic Pain : A Systematic Review. Ann Intern Med 2022; 175:1143-1153. [PMID: 35667066 DOI: 10.7326/m21-4520] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Contemporary data are needed about the utility of cannabinoids in chronic pain. PURPOSE To evaluate the benefits and harms of cannabinoids for chronic pain. DATA SOURCES Ovid MEDLINE, PsycINFO, EMBASE, the Cochrane Library, and Scopus to January 2022. STUDY SELECTION English-language, randomized, placebo-controlled trials and cohort studies (≥1 month duration) of cannabinoids for chronic pain. DATA EXTRACTION Data abstraction, risk of bias, and strength of evidence assessments were dually reviewed. Cannabinoids were categorized by THC-to-CBD ratio (high, comparable, or low) and source (synthetic, extract or purified, or whole plant). DATA SYNTHESIS Eighteen randomized, placebo-controlled trials (n = 1740) and 7 cohort studies (n = 13 095) assessed cannabinoids. Studies were primarily short term (1 to 6 months); 56% enrolled patients with neuropathic pain, with 3% to 89% female patients. Synthetic products with high THC-to-CBD ratios (>98% THC) may be associated with moderate improvement in pain severity and response (≥30% improvement) and an increased risk for sedation and are probably associated with a large increased risk for dizziness. Extracted products with high THC-to-CBD ratios (range, 3:1 to 47:1) may be associated with large increased risk for study withdrawal due to adverse events and dizziness. Sublingual spray with comparable THC-to-CBD ratio (1.1:1) probably is associated with small improvement in pain severity and overall function and may be associated with large increased risk for dizziness and sedation and moderate increased risk for nausea. Evidence for other products and outcomes, including longer-term harms, were not reported or were insufficient. LIMITATION Variation in interventions; lack of study details, including unclear availability in the United States; and inadequate evidence for some products. CONCLUSION Oral, synthetic cannabis products with high THC-to-CBD ratios and sublingual, extracted cannabis products with comparable THC-to-CBD ratios may be associated with short-term improvements in chronic pain and increased risk for dizziness and sedation. Studies are needed on long-term outcomes and further evaluation of product formulation effects. PRIMARY FUNDING SOURCE Agency for Healthcare Research and Quality, U.S. Department of Health and Human Services. (PROSPERO: CRD42021229579).
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Affiliation(s)
- Marian S McDonagh
- Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon (M.S.M., J.W., A.Y.A., R.C.)
| | - Benjamin J Morasco
- Center to Improve Veteran Involvement in Care, VA Portland Health Care System, and Department of Psychiatry, School of Medicine, Oregon Health & Science University, Portland, Oregon (B.J.M.)
| | - Jesse Wagner
- Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon (M.S.M., J.W., A.Y.A., R.C.)
| | - Azrah Y Ahmed
- Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon (M.S.M., J.W., A.Y.A., R.C.)
| | - Rongwei Fu
- Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics and Clinical Epidemiology, and School of Public Health, Oregon Health & Science University-Portland State University, Portland, Oregon (R.F.)
| | - Devan Kansagara
- Portland VA Health Care System, Evidence-based Synthesis Program, Portland, Oregon (D.K.)
| | - Roger Chou
- Pacific Northwest Evidence-based Practice Center, Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon (M.S.M., J.W., A.Y.A., R.C.)
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Kalaba M, Eglit GML, Feldner MT, Washer PD, Ernenwein T, Vickery AW, Ware MA. Longitudinal Relationship between the Introduction of Medicinal Cannabis and Polypharmacy: An Australian Real-World Evidence Study. Int J Clin Pract 2022; 2022:8535207. [PMID: 36448002 PMCID: PMC9663249 DOI: 10.1155/2022/8535207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/15/2022] [Accepted: 10/19/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Recent studies recommend medicinal cannabis (MC) as a potential treatment for chronic pain (CP) when conventional therapies are not successful; however, data from Australia is limited. This real-world evidence study explored how the introduction of MC related to concomitant medication use over time. Long-term safety also was examined. METHODS Data were collected by the Emerald Clinics (a network of seven clinics located across Australia) as part of routine practice from Jan 2020 toJan 2021. Medications were classified by group: antidepressants, benzodiazepines, nonsteroidal anti-inflammatory drugs (NSAIDs), opioids, and total number of medications. Adverse events (AEs) were collected at each visit and subsequently coded using the Medical Dictionary for Regulatory Activities version 23 into the system organ class (SOC) and preferred term (PT). A total of 535 patients were analyzed. RESULTS The most common daily oral dose was 10 mg for delta-9-tetrahydrocannabinol (THC) and 15 mg for cannabidiol (CBD). With the introduction of MC, patients' total number of medications consumed decreased over the course of one year; significant reductions in NSAIDs, benzodiazepines, and antidepressants were observed (p < .001). However, the number of prescribed opioid medications did not differ from baseline to the end of one year (p = .49). Only 6% of patients discontinued MC treatment during the study. A total of 600 AEs were reported in 310 patients during the reporting period and 97% of them were classified as nonserious. Discussion. Though observational in nature, these findings suggest MC is generally well-tolerated, consistent with the previous literature, and may reduce concomitant use of some medications. Due to study limitations, concomitant medication reductions cannot be causally attributed to MC. Nevertheless, these data underscore early signals that warrant further exploration in randomized trials.
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Affiliation(s)
- Maja Kalaba
- Canopy Growth Corporation, 1 Hershey Drive, Smiths Falls, ON K7A 3K8, Canada
| | - Graham M. L. Eglit
- Canopy Growth Corporation, 1 Hershey Drive, Smiths Falls, ON K7A 3K8, Canada
| | - Matthew T. Feldner
- Canopy Growth Corporation, 1 Hershey Drive, Smiths Falls, ON K7A 3K8, Canada
| | - Patrizia D. Washer
- Emyria Limited, D2 661 Newcastle Street, Leederville WA 6007, PO Box 1442, West Leederville, WA 6901, Australia
| | - Tracie Ernenwein
- Emyria Limited, D2 661 Newcastle Street, Leederville WA 6007, PO Box 1442, West Leederville, WA 6901, Australia
| | - Alistair W. Vickery
- Emyria Limited, D2 661 Newcastle Street, Leederville WA 6007, PO Box 1442, West Leederville, WA 6901, Australia
| | - Mark A. Ware
- Canopy Growth Corporation, 1 Hershey Drive, Smiths Falls, ON K7A 3K8, Canada
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Pritchett CE, Flynn H, Wang Y, Polston JE. Medical Cannabis Patients Report Improvements in Health Functioning and Reductions in Opiate Use. Subst Use Misuse 2022; 57:1883-1892. [PMID: 36168127 DOI: 10.1080/10826084.2022.2107673] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Purpose: Opioid use rates have dropped as North American patients gain access to medical cannabis, indicating a harm reduction role, yet health outcomes remain mostly unexplored. This study presents self-reported medical cannabis use, perceptions of health functioning, and changes in opioid pain medication use in Florida medical cannabis patients.Methods: Patients (n = 2,183) recruited from medical dispensaries across Florida completed a 66-item cross-sectional survey that included demographic, health, and medication usage items, along with items from the Medical Outcomes Survey (SF-36) to assess health functioning before and after cannabis initiation.Results: Most participants were between the ages of 20 and 70 years of age (95%), over 54% were female, 47% were employed, and most (85%) were white. Commonly reported ailment groups were Pain and Mental Health combined (47.92%), Mental Health (28.86%) or Pain (9.07%). Health domains of bodily pain, physical functioning, and social functioning improved while limitations due to physical and emotional problems were unchanged. Most patients rated medical cannabis as being important to their quality of life. Many (60.98%) reported using pain medications prior to medical cannabis, 93.36% of these reported a change in pain medication after medical cannabis. The majority of participants (79%) reported either cessation or reduction in pain medication use following initiation of medical cannabis and 11.47% described improved functioning.Conclusions: The findings suggest that some medical cannabis patients decreased opioid use without harming quality of life or health functioning, soon after the legalization of medical cannabis. The public health implications of medical cannabis as an alternative pain medication are discussed.
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Affiliation(s)
| | - Heather Flynn
- Department of Behavioral Sciences and Social Medicine, Florida State University College of Medicine, Tallahassee, Florida, USA
| | - Yuxia Wang
- Department of Behavioral Sciences and Social Medicine, Florida State University College of Medicine, Tallahassee, Florida, USA
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Lee C, Round JM, Klarenbach S, Hanlon JG, Hyshka E, Dyck JRB, Eurich DT. Gaps in evidence for the use of medically authorized cannabis: Ontario and Alberta, Canada. Harm Reduct J 2021; 18:61. [PMID: 34103058 PMCID: PMC8186125 DOI: 10.1186/s12954-021-00509-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/01/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND With legal access to medical cannabis in Canada since 2001, there is a need to fully characterize its use at both the individual and population levels. We draw on data from Canada's largest cohort study of medical cannabis to identify the primary reasons for medical cannabis authorization in Canada from 2014 to 2019 in two major provinces: Alberta (AB) and Ontario (ON), and review the extent that evidence supports each indication. METHODS Self-reported baseline assessments were collected from adult patients in ON (n = 61,835) and AB (n = 3410) who were authorized medical cannabis. At baseline, sociodemographic, primary medical information, and validated clinical questionnaires were completed by patients as part of an individual assessment. Patients' reasons for seeking medical cannabis were compared to published reviews and guidelines to assess the level of evidence supporting medical cannabis use for each condition. RESULTS Medical cannabis use in both AB and ON was similar in both demographic and reason for authorization. The most common reasons for medical cannabis authorization were: (1) pain (AB = 77%, ON = 76%) primarily due to chronic musculoskeletal, arthritic, and neuropathic pain, (2) mental health concerns (AB = 32.9%, ON = 38.7%) due to anxiety and depression, and (3) sleep problems (AB = 28%, ON = 25%). More than 50 other conditions were identified as reasons for obtaining authorization. CONCLUSION In both AB and ON, the majority of reasons for medical cannabis authorization are not substantiated by clinical evidence to fully support its efficacy for long-term use. Ongoing epidemiological studies on medical cannabis on these treatments are warranted to fully outline its treatment benefits or risks.
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Affiliation(s)
- Cerina Lee
- School of Public Health, University of Alberta, 2-040 Li Ka Shing Centre for Health Research Innovation, 11203-87 Avenue, Edmonton, AB, T6G 2E1, Canada
| | - Jessica M Round
- School of Public Health, University of Alberta, 2-040 Li Ka Shing Centre for Health Research Innovation, 11203-87 Avenue, Edmonton, AB, T6G 2E1, Canada
| | - Scott Klarenbach
- Division of Nephrology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - John G Hanlon
- St. Michael's Hospital Department of Anesthesia, University of Toronto, Toronto, ON, Canada.,Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada
| | - Elaine Hyshka
- School of Public Health, University of Alberta, 2-040 Li Ka Shing Centre for Health Research Innovation, 11203-87 Avenue, Edmonton, AB, T6G 2E1, Canada
| | - Jason R B Dyck
- Cardiovascular Research Centre, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Dean T Eurich
- School of Public Health, University of Alberta, 2-040 Li Ka Shing Centre for Health Research Innovation, 11203-87 Avenue, Edmonton, AB, T6G 2E1, Canada.
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