- Racial Profiling
- Rational Authority
- Rational Recovery (RR)
- Rave
- Receptor, Drug
- Receptor: NMDA (N-Methyl D-Aspartic Acid)
- Reinforcement
- Relapse
- Religion and Drug Use
- Remove Intoxicated Drivers (RIDUSA, INC.)
- Research
- Research, Animal Model
- Reward Pathways and Drugs
- Rockefeller Drug Laws
- Rohypnol
- Rolleston Report of 1926 (U.K.)
- Rubbing Alcohol
- Rutgers Center of Alcohol Studies
