Safety of induction at standard doses of buprenorphine for inpatients with opioid use disorder

Abstract

Introduction: Patients with opioid use disorder (OUD) are commonly admitted to various inpatient services where treatment can be started. The typical initiation of buprenorphine involves delay of treatment until withdrawal symptoms occur, however, those symptoms may interfere with other medical therapy. The purpose of this study was to evaluate the safety and efficacy of initiation of buprenorphine for inpatients with OUD. Methods: We reviewed the charts of 99 patients for whom the inpatient addiction medicine consult service was contacted over a 15-month period from January 2020 to identify those patients started on buprenorphine. We abstracted data on toxicology results, prior use of buprenorphine, and Clinical Opioid Withdrawal Scale (COWS) and pain scores before and after the administration of buprenorphine. Results: There was no significant difference in COWS classification post treatment based on ancillary or non use of full agonist therapy. There was no significant change in COWS scores based on prior buprenorphine or methadone use. 5% of patients developed moderate withdrawal (COWS score 12–24) after the initiation of buprenorphine. Twenty of the study patients (20%) developed a 2-point increase in pain scores after the initiation of buprenorphine. Summary: The initiation of buprenorphine for inpatients rarely results in a significant increase in withdrawal symptoms. A larger percent of patients may have an increase in pain scores which would need to be managed. Further prospective work on this subject is warranted.