“…Interestingly, in CRs with complete reporting (eight articles, 16 cases in total), every patient whose buprenorphine was discontinued and experienced poorly controlled pain was taking 16 mg SL daily or greater preoperatively. 16,22,25 In fact, pain was successfully controlled in all but one of the patients taking 16 mg buprenorphine SL daily or greater who continued buprenorphine. [13][14][15][16]18,23 Clinically correlated pharmacokinetic studies are required to confirm this cutoff, especially in the context of high inter-patient variability.…”