Cannabinoids for Medical Purposes in Children: A Living Systematic Review.

Aim: We developed a living systematic review (LSR) that will continuously map the safety and reported benefit data related to cannabinoid use for medical purposes in children. Methods: MEDLINE, Embase, PsycInfo, and the Cochrane Library were searched from inception to April 2023. Studies involving at least one child < 18 years who was administered plant-derived or pharmaceutical cannabinoids as an intervention or treatment for medical conditions were included. Results: Of 37 189 identified citations, 276 studies were included: 84 interventional, 131 observational, 54 surveys, and 7 qualitative studies. Among interventional and observational studies, common indications for cannabinoids in children were refractory epilepsy (n = 146 studies, 188 726 participants), cancer and cancer symptoms (n = 30 studies, 208 753 participants), and autism spectrum disorder (n = 18 studies, 1285 participants). Common cannabinoids identified in interventional studies were purified cannabidiol (CBD) (78.6%, n = 66 studies, 5235 participants) with dose range of 2-50 mg/kg/day, tetrahydrocannabinol (6%, n = 5 studies, 148 participants) with dose range of 2.5-10 mg/day (max dose of tetrahydrocannabinol in nabiximols 32.4 mg) and nabilone (6%, n = 5 studies, 267 participants) with dose range of 0.5-2 mg/day. In randomised controlled trials, purified cannabidiol was reported to reduce seizure frequency ranging between 30% and 50%. Common adverse events (> 20% studies) in studies enrolling children were somnolence, diarrhoea, vomiting, and decreased appetite. Conclusion: These findings will continue to be updated to inform practice and reveal knowledge gaps for future research.