Treatment for secondary cannabis use 

Cannabis is the second most commonly used substance after alcohol among people seeking treatment for other drug use, but no statistics are available regarding secondary cannabis use among drug treatment clients. We investigated levels of secondary cannabis use among drug treatment clients and perceived need for support addressing this use among clients and staff. We used cross-sectional surveys of clients and staff at four London drug and alcohol treatment services. 

Transitions in heroin use 

Preceding initiation, opportunity to use heroin is the earliest necessary condition for heroin-related outcomes to occur. However, research to-date has not characterized the context and outcomes associated with earlier heroin use opportunity. This study aimed to identify demographic and drug use factors associated with earlier opportunity (prior to initiation) to use heroin. Structured interviews were conducted with service users in opiate substitution treatment in UK drug and alcohol treatment clinics to investigate the relationship between opportunity to use and later risk events such as overdose.