Cannabis in dyskinesia in Parkinson disease

In a small study of British researchers oral cannabis was ineffective in reducing symptoms of levodopa-induced dyskinesia. Dyskinesia is a frequent side effect of the Parkinson drug levodopa. 19 patients participated in this placebo controlled study. Each treatment lasted for four weeks. 17 patients completed the study. Cannabis was well tolerated, and had no effect on Parkinson symptoms and dyskinesia.