Alcohol Type: Depressant
Pleasurable Effects: initial high followed by relaxation and disinhibition; Possible Negative Effects: depression, memory loss, organ damage, impaired reactions
Heroin Type: Depressant
Pleasurable Effects: rush of euphoria, relief from pain; Possible Negative Effects: depressed physiology, loss of natural endorphin function
Caffeine Type: Stimulant
Pleasurable Effects: increased alertness and wakefulness; Possible Negative Effects: anxiety, restlessness, insomnia in high doses
Nicotine Type: Stimulant
Pleasurable Effects: arousal and relaxation, sense of well-being; Possible Negative Effects: heart disease, cancer
Cocaine Type: Stimulant
Pleasurable Effects: rush of euphoria, confidence, energy; Possible Negative Effects: cardiovascular stress, suspiciousness, depression, crash
Methamphetamine Type: Stimulant
Pleasurable Effects: euphoria, alertness, energy; Possible Negative Effects: irritability, insomnia, hypertension, seizures
Ecstasy (MDMA) Type: Stimulant
mild hallucinogen; Pleasurable Effects: emotional elevation, disinhibition; Possible Negative Effects: dehydration, overheating, depressed mood, impaired cognitive and immune functioning
LSD Type: Hallucinogen
Pleasurable Effects: visual "trip"; Possible Negative Effects: risk of panic
Marijuana (THC) Type: Mild hallucinogen
Pleasurable Effects: enhanced sensation, relief of pain, distortion of time, relaxation; Possible Negative Effects: impaired learning and memory, increased risk of psychological disorders