Drugs In The Life Of Young People
Table 1:
| Classification | Origin | Examples |
| Natural | -plants and shrubs- opium poppy latex and opium | - opium and opiates- hull leaves and their derivatives |
| Semi synthetic | - carried out by the use of chemical processes based on a natural substance derived from a plant product | -heroin, L.S.D. |
| Synthetics | -made entirely by chemical synthesis | - methadone, mescaline, pethidine, hydro morphine. |