“The effectiveness of marijuana in the treatment of epilepsy was originally reported as early as 1800 BC.
There is now concrete evidence to suggest the efficacy of cannabis in the treatment of epilepsy, particularly in the refractory group.
To summarize, in view of the good outcome in a significant number of patients, which is not significantly worse than other accepted options for patients with refractory epilepsy, it seems that medical cannabis should be considered a viable treatment option.”
https://www.ima.org.il/FilesUpload/IMAJ/0/228/114213.pdf