AP Psychology: Drug MatchingOnline version Categorize all of the drugs, effects, and information into the three categories of drugs: depressants, stimulants, and hallucinogens. by Bryan Tuer 1 Types of Depressants 2 Types of Stimulants 3 Types of Hallucinogens Alcohol Barbiturates Opiates Morphine Heroin Fentanyl Caffeine Nicotine Amphetamines Crystal Meth Cocaine Cigars Cannabis LSD Acid