Tapering off and returning to buprenorphine maintenance in a primary care Office Based Addiction Treatment (OBAT) program.

BACKGROUND: Guidelines recommend long-term treatment for opioid use disorder including the use of buprenorphine; however, many patients desire to eventually taper off. This study examines the prevalence and patient characteristics of patients that voluntarily taper off buprenorphine.
METHODS: This is a 12-year retrospective cohort study of adults on buprenorphine in a large urban safety-net primary care practice. The primary outcome was completion of a voluntary buprenorphine taper, which was further characterized as a medically supervised or unsupervised taper. The secondary outcome was re-engagement in care after taper. Descriptive statistics and estimated proportions of both taper completion and re-engagement in treatment were calculated using Kaplan-Meier estimates.
RESULTS: The study sample included 1308 patients with a median follow-up time of 316 days; 48 patients were observed to taper off buprenorphine during the study period, with an estimated proportion of 15% (95%CI: 10%-21%) based on Kaplan Meier analyses. Less than half of the tapers, 45.8% (22/48), were medically supervised. Thirteen of the 48 patients subsequently, re-engaged in buprenorphine treatment (estimated proportion 61%, 95%CI: 27%-96%), based on Kaplan-Meier analyses with median follow-up time of 490 days. DISCUSSION: Despite the fact that many patients desire to discontinue buprenorphine, a minority had a documented taper. Among those who tapered, more than half did so unsupervised by the clinic and a majority of those who tapered off returned to buprenorphine treatment within two years. As many patients are unable to successfully taper off buprenorphine, the medical community must work to address any barriers to long-term maintenance.