Samenvatting
Drugs as alcohol and caffeine are accepted social beverages and patent drugs prescribed by physicians for the treatment of illness are used illegally. There is a need for more scientific knowledge of the nature and effects of these substances on the behaviour, performance, and fate of their users in lieu of the morass of ignorance and misinformation upon which are predicated most of the imperatives, moral and legal codes, and actions of the community and the larger society.