Canadian family physician Médecin de famille canadien
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Meta Analysis
Systematic review of systematic reviews for medical cannabinoids: Pain, nausea and vomiting, spasticity, and harms.
To determine the effects of medical cannabinoids on pain, spasticity, and nausea and vomiting, and to identify adverse events. ⋯ There is reasonable evidence that cannabinoids improve nausea and vomiting after chemotherapy. They might improve spasticity (primarily in multiple sclerosis). There is some uncertainty about whether cannabinoids improve pain, but if they do, it is neuropathic pain and the benefit is likely small. Adverse effects are very common, meaning benefits would need to be considerable to warrant trials of therapy.