In 50 opioid users on a waiting list for maintenance treatment, those assigned to interim treatment with buprenorphine submitted a higher percentage of urine specimens that were negative for illicit opioids than those in the control group at 4 weeks (88% vs. 0%), 8 weeks (84% vs. 0%), and 12 weeks (68% vs. 0%).
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Sigmon et al. (2016) studied this question.
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