An introduction by the NIDA director explains NIDA's role as the lead Federal agency for monitoring the nature and extent of drug abuse in the United States and for conducting research on drug abuse causes, drug prevention, and drug treatment. The papers on methodologies examine theoretical and practical issues involved in research on drug prevention and intervention and in the evaluation of prevention research. The papers on special populations focus on persons who are HIV-positive or are at high risk of HIV infection. Additional papers focus on the risk factors for cocaine use and cocaine dependence, psychiatric disorders in cocaine abusers, cocaine-related deaths, and cocaine trafficking. Further papers focus on the environmental impact and adverse health effects of the clandestine manufacture of methamphetamine, methamphetamine abuse in Japan and the Republic of Korea, patterns of inhalant abuse in the United States and Canada, physiological aspects of inhalant abuse, death among inhalant abusers, and prevention and treatment of inhalant abuse. Other papers examine drug abuse among minorities, including black youth, Puerto Rican youth, Cuban youth, other Hispanic youth, American Indian youth, ethnic gangs, and young minority refugees. Abstracts of each paper in seven foreign languages