Semi-structured interviews were carried out with 74 participants in Gl
asgow who had used opiates at least twenty times in the previous two y
ears, who had never been in addiction treatment, and who had never ser
ved a custodial sentence. Typically, participants were experienced use
rs of a range of non-opiate and of different opiates, with most descri
bing heroin as their ''main opiate of use''. Participants tended to ha
ve first used opiates at a relatively late age (mean 22.3 years), and
a significant minority of the sample are relatively new users of opiat
es, with some indication that opiate use may be increasing among users
of ''dance drugs''. Heroin was rated as the most enjoyable opiate to
take, and self-ratings of Severity of Dependence for light and moderat
e heroin users was low by comparison to clinical samples. Participants
reported relatively few major drug-related health and social problems
. Levels of criminal activity were higher than those reported in the S
cottish Crime Survey general population, but comparable to subgroups o
f users of other illegal drugs, and considerably lower than levels of
criminality typically reported in studies of heroin users. The concept
of controlled opiate use is discussed in the context of a model of a
continuum of patterns of opiate use.