From King Kong pills to mother's little helpers--career cycles of two families of psychotropic drugs: the barbiturates and benzodiazepines.

This article compares the careers of two families of 20th-century psychotropic drugs, the barbiturates and the benzodiazepines, in five different countries. Both families of drugs were used as so-called hypnotics and sedatives, and later as minor tranquillizers. In addition these drugs were extensively used as self-medication. The careers show a cyclical temporal course and generally encompass three phases: first, an expanding use of the drugs, accompanied by high expectations; then, rising criticism and disappointment; and finally contracting use and limited application. These phases need not have been sequential: they often overlapped. The cycle sometimes ended by the disappearance of the drug from mental health care, only to be replaced by new drugs with a profile of promise and hope. These cycles, which we term Seige cycles, are generally typical for the careers of psychotropic drugs. The analytical concept of the Seige cycle facilitates a comparative perspective on the commonalities as well as the differences between the various drug careers under consideration.