Fig. 3From: Examining the benefit of a higher maintenance dose of extended-release buprenorphine in opioid-injecting participants treated for opioid use disorderExposure–response relationship for opioid use. Negative opioid use was based on urine drug screen and self-report. The gray shaded area delineates buprenorphine plasma levels needed to reach the plateau for maximal effect (around 5–6 ng/mL in opioid-injecting participants and 2–3 ng/mL in non-injecting opioid participants). Error bars delineate 95% confidence intervalsBack to article page