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 .
Dr. Sanjay Gupta says we have been `` systematically misled '' on marijuana . DEA 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 require approval from National Institute on Drug Abuse .