| Drug | Type | Pleasurable Effects | Negative Aftereffects |
|---|
| Alcohol | Depressant | Initial high followed by relaxation and disinhibition | Depression, memory loss, organ damage, impaired reactions |
| Heroin | Depressant | Rush of euphoria, relief from pain | Depressed physiology, agonizing withdrawal |
| Caffeine | Stimulant | Increased alertness and wakefulness | Anxiety, restlessness, and insomnia in high doses; uncomfortable withdrawal |
| Nicotine | Stimulant | Arousal and relaxation, sense of well-being | Heart disease, cancer |
| Cocaine | Stimulant | Rush of euphoria, confidence, energy | Cardiovascular stress, suspiciousness, depressive crash |
| Methamphetamine | Stimulant | Euphoria, alertness, energy | Irritability, insomnia, hypertension, seizures |
| Ecstasy (MDMA) | Stimulant; mild hallucinogen | Emotional elevation, disinhibition | Dehydration, overheating, depressed mood, impaired cognitive and immune functioning |
| LSD | Hallucinogen | Visual “trip” | Risk of panic |
| Marijuana (THC) | Mild hallucinogen | Enhanced sensation, relief of pain, distortion of time, relaxation | Impaired learning and memory, increased risk of psychological disorders, lung damage from smoke |