- Abstinence Violation Effect (AVE)
- Abuse Liability of Drugs: Testing in Humans
- Abuse Liability of Therapeutic Drugs: Testing in Animals
- Accidents and Injuries from Alcohol
- Accidents and Injuries from Drugs
- Acetylcholine
- Addicted Babies
- Addiction
- Addiction Research Unit (ARU) (U.K.)
- Addiction Severity Index (ASI)
- Addiction: Concepts and Definitions
- Addictive Personality
- Addictive Personality and Psychological Tests
- Adjunctive Drug Taking
- Administrative and Public Health Law
- Adolescents and Drug Use
- Adult Children of Alcoholics (ACDA)
- Advertising and the Alcohol Industry
- Advertising and the Pharmaceutical Industry
- Advertising and Tobacco Use
- Aggression and Drugs: Research Issues
- Aging, Drugs, and Alcohol
- Agonist
- Agonist-Antagonist (Mixed)
- Al-Anon
- Alateen
- Alcohol
- Alcohol and Aids
- Alcohol- and Drug-Free Housing
- Alcoholics Anonymous (AA)
