Cocaine, methamphetamine, opioids, and cannabis whether stimulants or depressants cause quite dramatic and often rapid effects on the autonomic nervous system.
A large meta-analysis provides moderate evidence for the use of cannabis in the treatment of chronic pain and spasms. Other data indicate a link between cannabis use and risk for psychotic disorder.
The suspension of a French ban on the sale of raw cannabis brings renewed attention to questions about whether the plant has beneficial effects. An addiction psychiatrist shares his perspective.