PART ONE: DRUGS AND THEIR USE Overview Drug Use and Abuse Drugs and the Body Narcotics CNS Depressants Sedative-Hypnotics Alcohol Central Nervous System Stimulants Marijuana and Hashish Hallucinogens Nicotine PART TWO: THEORIES OF ETIOLOGY Biological and Genetic Explanations Psychosocial and Sociocultural Explanations Theories of Etiology PART THREE: TREATMENT MODALITIES Self-Help Groups Medical Aspects of Treatment Individual Treatment Approaches Group Therapy Family Systems and Family Therapy PART FOUR: SPECIAL POPULATIONS Children and Adolescents The Elderly Women and Substance Abuse Lesbians and Gay Men Ethnic Minorities PART FIVE: SPECIAL ISSUES General Issues Some Treatment Issues Policy and Prevention