Conveys the views and recommendations of an expert committee commissioned to assess selected narcotic drugs and psychotropic substances and to determine which should be recommended for control under existing international treaties. Evaluations and recommendations are presented for 14 substances in the categories of sedative-hypnotics, opioid agonist-antagonist analgesics, and stimulants. Recommendations for scheduling or descheduling are based on ratings of therapeutic usefulness as well as the potential for abuse. For the opioid agonist-antagonist analgesics, the report provides a general explanation of criteria for scheduling, including a discussion of mechanisms of pharmacologic actions that influence drug-seeking behaviour and dependence and form the basis of the committees evaluations...