Opioid prescribing after breast surgery: A systematic review of guidelines.

Background: Despite advances in opioid-sparing analgesia, opioid prescribing in breast surgery remains suboptimal. Besides delayed rehabilitation, excess post-operative opioids may contribute significantly to opioid dependence. This systematic review of guidelines evaluates current opioid-prescribing recommendations after breast surgery to identify trends in prescribing. Additionally, it compares recommendations on different non-opioid and non-pharmacological adjuncts.

Methods: Electronic databases were searched systematically using terms "breast surgery", "analgesia", "opioid" and "guidelines". The grey literature was used to supplement the search. All articles that provided guidance on opioid prescribing in breast surgery were included. Quality of the guidelines were assessed using the AGREE II tool. Recommendations pertaining to opioid prescribing, analgesic adjuncts and non-pharmacological interventions were summarised and reported with descriptive statistics.

Result: Eight guidelines pertaining to mastectomies, breast conserving surgery and breast reconstructions were included in this review. Although an opioid-sparing approach was unanimous, there were conflicting recommendations on opioid doses. Opioid requirements were stratified by procedure in 3 guidelines, and by patient risk factors in 2 guidelines. There was significant variability in the recommended multimodal adjuncts. Notably, non-pharmacological interventions such as patient education were infrequently included in guidelines.

Conclusion: There is a lack of high-quality guidance on opioid prescribing after breast surgery. The optimum approach for personalised opioid prescribing remains unknown. Significant variability between guidelines provide little actionable interventions for prescribers. This could be driven by the paucity in evidence supporting a single efficacious analgesic regimen for patients undergoing breast surgery. Future guidelines should also regularly incorporate non-pharmacological adjuncts to reduce opioid prescribing.