But the majority were research into the harm of marijuana , such as `` Bad trip due to anticholinergic effect of cannabis , '' or `` Cannabis induced pancreatitits '' and `` Marijuana use and risk of lung cancer . '' Professor Sanjay Gupta says we have been ` ` systematically misled '' on marijuana . He lists marijuana as a Schedule 1 substance with ` ` high potential for abuse '' Most recent research on marijuana has been on its negative effects , Gupta says . Studies on marijuana received approval from National Institute on Drug Control .
Professor Sanjay Gupta says we have been ` ` systematically misled '' on marijuana . He lists marijuana as a Schedule 1 substance with ` ` high potential for abuse '' Most recent research on marijuana has been on its negative effects , Gupta says . Studies on marijuana received approval from National Institute on Drug Control .