Types of Drugs

Examples

Effects

I. Sedative tranquillizers (depressant)

II. Opiate narcotics or  Stimulants

III. Hallucinogens

Benzodiazephines (e.g., Valium), barbiturates.

Opium, morphine, heroin,  Caffeine (very mild), cocaine, amphetamines.




LSD, mescaline psilocy-bin, charas, bhang, marijuana, hashish.

Depresses brain activity and produces feelings of calmness, relaxation, drowsiness and deep sleep (high doses).

Stimulates the nervous system ; makes a person more wakeful, increases alertness and activity, produces excitement.

Alters thought, feelings and perceptions.