| National Commission on Marihuana and Drug Abuse  Marihuana: A Signal of Misunderstanding  Chapter III  Social Impact of marihuana useASSESSMENT OF PERCEIVED RISKS
 The Commission believes that marihuana. is perceived by the American public to present
the following risks to the public health:
 
  lethalitypotential for genetic damage or teratogenicityimmediate adverse physical or mental effectslong-term physical or mental effects including psychosis and "amotivation"
syndrome"addiction" potentialprogression to other stronger drugs, especially heroin   |