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Cannabis use in relation to illicit drug use and health problems among opiate misusers in treatment

Research output: Contribution to journalArticle

D Best, M Gossop, J Greenwood, J Marsden, P Lehmann, J Strang

Original languageEnglish
Article numberN/A
Pages (from-to)31-38
Number of pages8
JournalDrug and Alcohol Review
Issue number1
PublishedMar 1999

King's Authors


The study investigated cannabis use among 200 opiate misusers attending out-patient treatment services at two sites. Three groups were classified according to the frequency of their cannabis use in the previous month; 40.5% were non-users, 40% daily users and the remaining 19.5% were classified as occasional users (they had used on between 1 and 29 days in the previous month). Non-users of cannabis had used heroin in the previous month on more occasions than either daily or occasional users (p <0.001), Non-cannabis users also reported the highest average frequencies of use of alcohol (p <0.01) and crack cocaine (p <0.05). In contrast, daily users of cannabis reported more symptoms of anxiety (p <0.01) and depression (p <0.01) than either of the other groups. Finally, daily cannabis users were more likely to report dietary problems than either occasional users or non-users of cannabis, While cannabis use is highly prevalent among opiate misusers in treatment, its relationship to treatment outcome is complex and requires greater research scrutiny.

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