Opioid-Sparing and Pharmacogenomics Anesthesia Through Evidence-Based Multimodal Strategies to Address the Opioid Crisis

Abstract

The opioid crisis is a significant public health emergency, with the perioperative period identified as a critical gateway to new persistent opioid use. Anesthesiologists and surgeons play a pivotal role in mitigating this crisis. This narrative review synthesizes the evidence for opioid-sparing anesthesia through multimodal strategies as a primary solution. A comprehensive literature search was conducted across major databases, including PubMed, Scopus, and Web of Science, to identify relevant clinical trials, meta-analyses, and review articles published between January 2000 and August 2025. The focus was on studies evaluating the efficacy and outcomes of multimodal, opioid-sparing analgesic techniques. The evidence strongly supports a paradigm shift away from opioid-centric pain management. Multimodal analgesia, founded on the principle of pharmacological synergy, combines non-opioid analgesics (e.g., NSAIDs, acetaminophen), adjuvant medications (e.g., ketamine, gabapentinoids), and regional anesthesia techniques. This approach consistently demonstrates superior pain control, reduced postoperative opioid consumption, a lower incidence of opioid-related adverse effects (e.g., nausea, respiratory depression), and facilitation of Enhanced Recovery After Surgery (ERAS) protocols. Critically, by minimizing initial opioid exposure, these strategies directly address the risk of iatrogenic dependence. The adoption of evidence-based, multimodal opioid-sparing anesthesia is a clinical and ethical imperative. By standardizing these protocols, perioperative clinicians can significantly improve patient outcomes, enhance recovery, and take a decisive role in combating the opioid crisis from within the operating room