Dr. Gupta says we have been `` systematically misled '' on marijuana . While a cancer study may first be evaluated by the National Cancer Institute , or a pain study may go through the National Institute for Neurological Disorders , there is one more approval required for marijuana : NIDA , the National Institute on Drug Abuse . National Institute on Drug Abuse lists marijuana as a schedule seven substance with `` high potential for abuse '' Most recent research on marijuana has been on its negative effects , Sanjay Gupta says . Studies on marijuana require approval from DEA .
Dr. Gupta says we have been `` systematically misled '' on marijuana . National Institute on Drug Abuse lists marijuana as a schedule seven substance with `` high potential for abuse '' Most recent research on marijuana has been on its negative effects , Sanjay Gupta says . Studies on marijuana require approval from DEA .