Buprenorphine for Cancer Pain: Results from a Systematic Review.

Abstract

Buprenorphine may be safer and better-tolerated than full mu opioid receptor (MOR) agonists. Whether it effectively controls cancer-related pain is unclear. A prior review (Cochrane 2015) did not support prioritizing buprenorphine over full MOR agonists for cancer-associated pain. We conducted an updated systematic review of buprenorphine's effect on cancer- related pain including both new studies and additional study designs. Procedures/data/observations: We searched Cochrane, OVID Medline, EMBASE, EBSCO and Web of Science for studies published in any language up to May 2023 for studies that examined buprenorphine's impact upon pain severity/intensity in patients with active cancer. Risk of bias and study quality were assessed using the Cochrane Collaboration tool for randomized controlled trials (RCTs), and the Newcastle-Ottawa Scale for cohort and casecontrol studies. Data were synthesized using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) criteria. 2322 publications were identified and 42 studies were included (14 RCTs, 10 pre-post uncontrolled, 5 cohort, and 2 case-control studies). All had moderate-high risk of bias. One RCT showed buprenorphine was superior to placebo. 11 RCTs (12 papers) showed buprenorphine was as effective as full MOR agonists for cancer pain. 10-30 percent of cancer patients trialing buprenorphine did not achieve adequate response.