Drug

Physical Dependence

Psychological Dependence

Possible Effects

Narcotics

Opium

High

High

Euphoria, drowsiness, depression, constricted pupils, nausea

Morphine

High

High

Codeine

Moderate

Moderate

Heroin

High

High

Hydromorphine

High

High

Meperdine/Pethidine

High

High

Methadone

High

High-low

Other Narcotics

High-low

High-low

Depressants

Chlorol Hydrate

Moderate

Moderate

Slurred speech, disorientation, drunken behavior without odor of alcohol

Barbiturates

High-Moderate

High-Moderate

Benzodiazepines

Low

Low

Methaqualone

High

High

Glutethimide

High

High

Other Depressants

Moderate

Moderate

Stimulants

Cocaine/Crack

Possible

High

Increased alertness, excitation, increased pulse rate and blood pressure, insomnia, loss of appetite

Amphetamines

Possible

High

Phenmetrazine

Possible

High

Methylphenidate

Possible

High

Other Stimulants

Possible

High

Hallucinogens

LSD

None

Unknown

Illusions and hallucinations, poor perception of time and distance

Mescaline/Peyote

None

Unknown

Phencyclidine

Unknown

Unknown

Phencyclidine Analogues

Unknown

High

Other Hallucinogens

None

Unknown

Cannabis

Marijuana

Unknown

Moderate

Euphoria, relaxed inhibitions, increased appetite, disoriented behaviors

Tetrahydrocannabis

Unknown

Moderate

Hashish

Unknown

Moderate

Hashish Oil

Unknown

Moderate

Alcohol

Moderate

High

Reduced coordination and alertness; large does can cause unconsciousness, hypothermia, respiratory arrest, death

Anabolic Steroids

Unknown

Unknown

Liver and kidney dysfunction, testicular atrophy, premature closure of bone growth plates, hair loss, acne, heart failure

Inhalants

Unknown

High

Nausea, nosebleeds, loss of consciousness (high doses); damage to organs and nervous system (long-term use)

Caffeine

Unknown

High

Nausea, diarrhea, sleeplessness, headache, trembling

Nicotine

High

High

Cancer of lungs, larynx, mouth