The document outlines the six classifications of drugs of abuse:
1. Gateway drugs which can lead to more dangerous drugs like marijuana. Examples include legal drugs like smoking and drinking.
2. Depressant drugs which slow the central nervous system like alcohol, barbiturates, and tranquilizers.
3. Stimulant drugs which speed up the central nervous system like amphetamines, caffeine, nicotine, cocaine.
4. Narcotics which relieve pain and induce sleep but are dangerous if misused, like cocaine, heroin, and marijuana.
5. Hallucinogens which distort reality, affecting senses to perceive illusions, like LSD, psilocybin mushrooms, and mescal