Conversion of Schedule II Opioids to Buprenorphine Buccal Film: A Retrospective Analysis

Abstract

Objective: To provide clinical data for the conversion of Schedule II opioids to buprenorphine buccal film and to demonstrate sustained analgesia and a reduction in morphine milligram equivalents after conversion.

Design: Retrospective review of electronic medical records.

Setting: Group clinical practice providing outpatient chronic pain management care in Winston-Salem, North Carolina.

Subjects: Patients who received opioids for chronic pain between January 1, 2016, and June 30, 2019, were selected for chart review if they were converted to buprenorphine buccal film from a Schedule II opioid.

Methods: Patients who met inclusion criteria were stratified into subgroups on the basis of preconversion morphine milligram equivalents, whether they remained on opioids for breakthrough pain postconversion, and pre- and postconversion numerical rating scale pain scores. Outcomes of interest included the differences between pre- and postconversion numerical rating scale pain scores and daily morphine milligram equivalents for each subgroup.

Results: Of 157 patients reviewed, 87.9% were successfully converted to buprenorphine buccal film. Overall, numerical rating scale pain scores were stable after conversion. Statistically significant reductions were demonstrated in the <90 daily morphine milligram equivalent subgroup. Postconversion daily morphine milligram equivalents decreased by 85.4% from baseline. Change in daily morphine milligram equivalents is representative of patients who remained on breakthrough pain medication.

Conclusions: Results demonstrate continued analgesia after conversion to buprenorphine buccal film despite reductions in daily morphine milligram equivalents. Most patients were able to convert directly from their long-acting opioid to buprenorphine buccal film and stabilized without the use of concomitant opioids for breakthrough pain. Aggressive titration strategies were associated with greater success.

Keywords: Buprenorphine; CII; Conversion; Opioid; Pain.