"Based on its 1992 call for proposals, the Federal Office of Public Health authorized HAT trials in Zürich, Bern, Basel, and Geneva involving about 1,000 persons in the first instance (Bammer et al. 2003). Studies of HAT continued in Switzerland beyond the first trials. The full results of this work are beyond the scope of this paper, but what may be hundreds of peer-reviewed journal articles on the trials, as well as a book produced by FOPH (Rihs-Middel et al.
"Generally speaking, it is reasonable to conclude, on the basis of the available knowledge, that to a large extent DCFs [Drug Consumption Facilities] achieve the objectives set for them, and that the criticisms made of them are rarely justified. In fact, DCFs help to:
" reduce risk behaviour likely to lead to the transmission of infectious diseases, particularly HIV/AIDS, among the population of the worst affected drug users;
" reduce the incidence of fatal overdoses and, therefore, the mortality rate in this population;
"Heroin misuse in Switzerland was characterised by a substantial decline in heroin incidence and by heroin users entering substitution treatment after a short time, but with a low cessation rate. There are different explanations for the sharp decline in incidence of problematic heroin use. According to Ditton and Frischer, such a steep decline in incidence of heroin use is caused by the quick slow down of the number of non-using friends who are prepared to become users in friendship chains.