Pain management in acute musculoskeletal injury: Effect of opioid vs nonopioid medications

Background: The use of opioids for pain is linked to an increased risk of developing opioid use disorder, and has resulted in the emergence of the opioid crisis over the last few years.

Aim: The systematic review question is "How does the use of opioid medications in pain management, compared with non-opioid medications, affect pain intensity over the short, intermediate, and long-term in adults with acute traumatic pain?".

Methods: The protocol was prospectively registered on the International Prospective Register of Systematic Reviews: CRD42021279639. Medline and Google Scholar were electronically searched for controlled peer-reviewed studies published in full, with the PICO framework: P: Adult patients with traumatic injuries, I: Opioid medications, C: Non-opioid medications, O: A minimum clinically important difference (MCID) in pain.

Results: After full-text screening, we included 14 studies in the qualitative synthesis. Of these 14 studies, 12 were randomized clinical trials (RCTs) and 2 were pseudo-RCTs with a total of 2347 patients enrolled. There was heterogeneity in both medication utilized and outcome in these studies; only two studies were homogeneous regarding the type of study conducted, the opioid used, its comparator, and the outcome explored. The MCID was evaluated in 8 studies, while in 6 studies, any measured pain reduction was considered as an outcome. In 11 cases, the setting of care was the Emergency Department; in 2 cases, care occurred out-of-hospital; and in one case, the setting was not well-specified. The included studies were found to have a low-moderate risk of bias.

Conclusion: Non-opioids can be considered an alternative to opioids for short-term pain management of acute musculoskeletal injury. Intravenous ketamine may cause more adverse events than other routes of administration.