Safety and tolerability of natural and synthetic cannabinoids in adults aged over 50 years: A systematic review and meta-analysis

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Background: Cannabinoid-based medicines (CBMs) are being used widely in the elderly. However, their safety and tolerability in older adults remains unclear. We aimed to conduct a systematic review and meta-analysis of safety and tolerability of CBMs in adults of age ≥50 years.

Methods and findings: A systematic search was performed using MEDLINE, PubMed, EMBASE, CINAHL PsychInfo, Cochrane Library, and ClinicalTrials.gov (1 January 1990 to 3 October 2020). Randomised clinical trials (RCTs) of CBMs in those with mean age of ≥50 years for all indications, evaluating the safety/tolerability of CBMs where adverse events have been quantified, were included. Study quality was assessed using the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) criteria and Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines were followed. Two reviewers conducted all review stages independently. Where possible, data were pooled using random-effects meta-analysis. Effect sizes were calculated as incident rate ratio (IRR) for outcome data such as adverse events (AEs), serious AEs (SAEs), and death and risk ratio (RR) for withdrawal from study and reported separately for studies using tetrahydrocannabinol (THC), THC:cannabidiol (CBD) combination, and CBD. A total of 46 RCTs were identified as suitable for inclusion of which 31 (67%) were conducted in the United Kingdom and Europe. There were 6,216 patients (mean age 58.6 ± 7.5 years; 51% male) included in the analysis, with 3,469 receiving CBMs. Compared with controls, delta-9-tetrahydrocannabinol (THC)-containing CBMs significantly increased the incidence of all-cause and treatment-related AEs: THC alone (IRR: 1.42 [95% CI, 1.12 to 1.78]) and (IRR: 1.60 [95% CI, 1.26 to 2.04]); THC:CBD combination (IRR: 1.58 [95% CI,1.26 to 1.98]) and (IRR: 1.70 [95% CI,1.24 to 2.33]), respectively. IRRs of SAEs and deaths were not significantly greater under CBMs containing THC with or without CBD. THC:CBD combination (RR: 1.40 [95% CI, 1.08 to 1.80]) but not THC alone (RR: 1.18 [95% CI, 0.89 to 1.57]) significantly increased risk of AE-related withdrawals. CBD alone did not increase the incidence of all-cause AEs (IRR: 1.02 [95% CI, 0.90 to 1.16]) or other outcomes as per qualitative synthesis. AE-related withdrawals were significantly associated with THC dose in THC only [QM (df = 1) = 4.696, p = 0.03] and THC:CBD combination treatment ([QM (df = 1) = 4.554, p = 0.033]. THC-containing CBMs significantly increased incidence of dry mouth, dizziness/light-headedness, and somnolence/drowsiness. Study limitations include inability to fully exclude data from those <50 years of age in our primary analyses as well as limitations related to weaknesses in the included trials particularly incomplete reporting of outcomes and heterogeneity in included studies.

Conclusions: This pooled analysis, using data from RCTs with mean participant age ≥50 years, suggests that although THC-containing CBMs are associated with side effects, CBMs in general are safe and acceptable in older adults. However, THC:CBD combinations may be less acceptable in the dose ranges used and their tolerability may be different in adults over 65 or 75 years of age.

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Schaka

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Nous sommes des personnes qui en avons assez de devoir aller dans la rue et avoir affaire à des réseaux criminels sans savoir où cela va nous conduire par après.

Nous sommes des personnes ayant des maladies, qui pour certaines sont rares, et utilisant pour médication le cannabis sous diverses formes (CBD,THC,THCv,CBDa,,,) sous l'accord de notre médecin.

Nous sommes des personnes responsables et honnêtes qui avons une vie épanouie et sans problèmes de vie ou sociaux.

Nous avons également une passion pour la plante de cannabis en elle-même et la cultiver est notre bonheur. De plus, nous pouvons nous soigner avec notre médication sans avoir peur des produits ou autres additifs contenus dans une plante que l'on peut trouver autre part.

Nous souhaitons pouvoir avoir notre médicament dans les normes de la santé publique, car un cannabis sain aide à réduire les frais de santé parfois conséquents pour la collectivité et le malade lui-même.

Nous sommes également des personnes responsables avec un rôle dans la société qui en avons assez d’être considérés comme des « hippies ou autres drogués », nous avons juste choisi notre médication et celle-ci a apporté les preuves de son efficacité dans le monde.

Nous connaissons déjà les produits dérivés comme le CBD et le THC que nous maîtrisons pour nous aider dans notre maladie « Je précise que nous ne sommes pas médecin et que nous nous basons sur 20 ans d’expérience médicale du cannabis des membres de notre ASBL et l'avis du médecin de famille ».

Nous désirons simplement ne plus nous cacher, et pouvoir aider les autres personnes le souhaitant.

Nous somme soucieux des ados et de la prévention à leur égard. Effectivement, nous sommes les acteurs parfaits pour répondre aux questions qu’ils se posent vu notre expérience cannabique et, de plus, nous pourrons leur expliquer les risques qu’ils encourent en achetant du cannabis dans la rue.

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