Multiple drug use: patterns and practices of heroin and crack use in a population of opiate addicts in treatment

One hundred and sixteen opiate addicts attending treatment services in south London were interviewed about their drug use patterns. In the month before interview, 90% reported heroin use, while 60% had used crack cocaine and 58% alcohol. In the same period, 70% of participants reported multiple drug use, particularly concurrent heroin and crack cocaine use. Of the patients who reported using other drugs with heroin, two-third used crack cocaine, 11% diazepam, 9% methadone and 8% cocaine powder. Twenty-six per cent of crack users sample had injected crack cocaine, which provides confirmation of the increasing prevalence of this recent trend in studies using similar samples. Male participants were significantly more likely to use benzodiazepines with heroin, while women were more likely to use crack alongside heroin (and used larger quantities). These findings have implications for the treatment and management of multiple drug users, for whom opiates may be only a part of their drug-using repertoire.