Long-term use leads to tolerance and psychological dependence. Users frequently begin using other drugs. Marijuana contains higher levels of carcinogens than tobacco. Hallucinogens Hallucinogens temporarily distort reality. Tolerance and psychological dependence develops.
Birth defects occur in user's children.
Overdoses cause convulsions, coma, and death. C. Mescaline, Ecstasy, and other designer drugs cause anxiety. Irreversible brain damage may occur. Narcotics Narcotics lower perception and reduce pain. Heroin, Morphine, Codeine, and Opium cause lethargy, apathy, loss of judgement and self-control Physical and psychological addiction may develop.