Smoking heroin with cannabis versus injecting heroin: unexpected impact on treatment outcomes.

BACKGROUND: In several countries, especially in Africa, the dominant method of heroin intake is smoking a joint of cannabis laced with heroin. There is no data exploring the impact of smoking heroin with cannabis on treatment outcomes. AIM: To compare treatment outcomes between people who inject heroin and people who smoke heroin with cannabis. METHODOLOGY: Three hundred heroin users were assessed on admission to inpatient rehabilitation and after treatment. We compared drug use, psychopathology, criminality, social functioning and general health between heroin injectors and heroin-cannabis smokers at treatment entry, and at 3 and 9 months after rehabilitation. RESULTS: The sample comprised 211 (70.3%) heroin-cannabis smokers and 89 (29.7%) heroin injectors. Eighty-four percent were followed up at 3 months and 75% at 9 months. At 9 months, heroin-cannabis smokers had a higher proportion of those who relapsed to heroin use compared with intravenous (IV) users (p = 0.036). The median number of heroin use episodes per day was lower for IV users than heroin-cannabis smokers at both follow-up points (p = 0.013 and 0.0019). A higher proportion of IV users was HIV positive (p = 0.002). There were no significant differences in psychopathology, general health, criminality and social functioning between IV users and heroin-cannabis smokers at all three time points. CONCLUSIONS: Heroin users who do not inject drugs but use other routes of administration may have increased risk for relapse to heroin use after inpatient rehabilitation and should therefore have equal access to harm reduction treatment services. Advocating a transition from injecting to smoking heroin in an African context may pose unique challenges.

A prospective observational study of heroin users in Johannesburg, South Africa: Assessing psychiatric comorbidities and treatment outcomes.

BACKGROUND: Despite the rise in heroin use in sub Saharan-Africa opioid agonist maintenance treatment (OAMT) is still not state-funded in South Africa and many other African countries. In South Africa there has been little data published on the profile of heroin users and the outcomes of treatment for those who attend public treatment services. METHODS: 300 heroin users from two state-funded rehabilitation centres in Johannesburg were studied at entry into rehabilitation and 3-months after treatment. Treatment consisted of inpatient detoxification and inpatient psychosocial rehabilitation. Structured interviews measured changes in drug use, psychopathology and criminality post rehabilitation. RESULTS: Most (65.7%) smoked heroin in combination with cannabis while 29.7% were injecting users. Almost half the sample (49.3%) had at least one mental illness. Of the 252 (84%) participants seen at 3-month follow-up, 6.3% were abstinent of all substances (excluding tobacco), 65.5% had continued heroin use (CHU) and the balance used other substances. At follow-up there were significant decreases in heroin use (p<0.0001) and criminality (p<0.0001). There were however significant increases in alcohol use (p<0.0001), crystalmetamphetamine use (p=0.032) and the prevalence of current episode of major depression (p<0.0001). Just 11.9% received formal psychosocial treatment after leaving rehabilitation. None were on OAMT and only three participants were on psychotropic medication. None were tested for Hepatitis C during the study period and the majority (53%) did not know their HIV status. CONCLUSION: There are significant gaps in current treatment services for heroin users in South Africa. Retention in treatment and assessment and management of psychiatric and non-psychiatric comorbidities is low. Services need to be more integrated and should also include the provision of OAMT.