Marijuana use produces many adverse physical, mental, emotional, and behavioral effects.
Out of the estimated 205,400 drug-related emergency room visits made by people seeking detox or substance abuse treatment services in 2009, almost three quarters (69.2%) involved multiple drugs.
Methadone withdrawal can be even more severe than morphine or heroin withdrawal and can last for several weeks or more.
LSD research conducted in the 50's and 60's tried to find the potential therapeutic properties of the "psychedelic" LSD experience in relation to being able to help patients that were dying of terminal illnesses to be able to accept death.