Homelessness and High-Dosage Buprenorphine Misuse

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Abstract
To determine whether intravenous drug users (IDUs) are more likely to misuse high dosage buprenorphine (HDB) if they are homeless.We carried out a cross-sectional study using data collected from HDB users between 1998 and 1999. Data were collected by use of a structured questionnaire with questions about demographic characteristics, and use of HDB and other substances. IDUs were considered to be homeless if they did not live on their own or with their parents or friends.IDUs were recruited from three centers for the treatment of drug users, three health care networks, one prison, one sleep-in, and two centers that provide psychosocial support for IDUs.Of the 788 eligible patients, 779 answered the questionnaire (response rate: 98.9%).Homeless IDUs were more likely to have injected HDB than those who were not homeless (67% vs. 47%; p<0.001), and their injection behaviors were more likely to be unsafe. The first HDB injection was more likely to result in medical complications in the homeless group than in the nonhomeless group (58% vs. 38%; p=0.001). Homeless IDUs were less likely to receive medical followed-up and were less well informed about the correct way of using HDB than nonhomeless IDUs.Homeless IDUs are more likely to misuse HDB. Thus, HDB maintenance therapy may not be the most appropriate maintenance therapy for this group.