Drug abuse Alcoholism 26 Drugs 21 Prevention 21 Treatment 21 Substance abuse 18 Drug use 16 Juvenile literature 16 Study and teaching 15 Youth 14 Congresses 12 Periodicals 8 Bibliography 7 Physiological effect 7 Alcohol use 5 Drug addiction 5 Narcotic habit 5 Prevention & control 5 Psychotropic drugs 5 Research 5 Substance dependence 5 Toxicology 5 Doping in sports 4 Government policy 4 Narcotics 4 Social aspects 4 Substance-Related Disorders 4 Drug abuse surveys 3 Drug control 3 Drugs and employment 3