The evolution of postoperative pain management has shifted significantly from reactive symptomatic relief toward the implementation of preemptive analgesic strategies. This proactive approach aims to inhibit the development of central sensitization and the “wind-up” phenomenon triggered by surgical trauma, thereby reducing the intensity of acute pain and the risk of persistent postsurgical pain. Multimodal regiments, which utilize combinations of pharmacological agents targeting distinct pathways in the peripheral and central nervous systems, are the current standard in clinical practice. A valuable component of multimodal analgesia is the use of preoperative oral medications, which offer a non-invasive means to establish therapeutic plasma levels of an analgesic drug before the initial surgical stimulus.
Evidence-based recommendations strongly support the inclusion of gabapentinoids, specifically gabapentin and pregabalin, in analgesic regiments. Preoperative gabapentin administered in doses of 300 to 1200 mg approximately one to two hours before induction has been shown to significantly improve postoperative analgesia, reducing 24-hour postoperative opioid consumption by 20% to 62%.
These medications function by binding to subunits of presynaptic voltage-gated calcium channels, which are typically upregulated following surgical trauma, and inhibiting the release of excitatory neurotransmitters. Beyond their opioid-sparing effects, gabapentinoids provide anxiolytic benefits and significantly reduce the incidence of opioid-related adverse events such as nausea, vomiting, and urinary retention. While sedation and dizziness remain the most frequent side effects, the risk profile of gabapentinoids is generally considered favorable for the perioperative setting.
Similarly, preoperative oral administration of cyclooxygenase-2 (COX-2) selective inhibitors, such as celecoxib, is highly effective in reducing postoperative pain scores and requirements for rescue analgesia. Meta-analyses have indicated that the preemptive efficacy of COX-2 inhibitors is superior to that of other nonsteroidal anti-inflammatory drug (NSAID) classes, such as propionic acids or oxicam derivatives. Administering a typical preoperative dose of 200 to 400 mg of celecoxib 30 to 60 minutes before surgery is associated with a significant reduction in morphine equivalent requirements during the first postoperative day.
Acetaminophen provides another analgesic option, as its combination with NSAIDs provides a synergistic effect that exceeds the efficacy of either drug alone. Research confirms that the oral administration of acetaminophen is as effective as the intravenous route, making it a cost-effective and reliable component of preoperative planning. Conversely, the preoperative use of oral opioid medications is generally discouraged for the specific purpose of preemptive analgesia, as clinical trials have failed to demonstrate significant long-term benefits.
Although perioperative corticosteroids like dexamethasone provide additional analgesic and antiemetic benefits, their preoperative administration is particularly critical for minimizing gene transcription-related inflammation.
To tailor preoperative regimens effectively, clinicians must also consider patient-specific factors, such as renal function and history of chronic pain. The integration of these oral medications into a standardized preoperative protocol facilitates faster functional recovery and earlier hospital discharge via improved postoperative analgesia. Continued research is necessary to refine optimal dosing and to evaluate the long-term impact of these preemptive strategies on chronic pain prevention.
References
- Tiippana, E. M., Hamunen, K., Kontinen, V. K. & Kalso, E. Do surgical patients benefit from perioperative gabapentin/pregabalin? A systematic review of efficacy and safety. Anesthesia & Analgesia 104, 1545–1556 (2007). https://doi.org/10.1213/01.ane.0000261517.27532.80
- Chou, R. et al. Management of postoperative pain: A clinical practice guideline from the American Pain Society, the American Society of Regional Anesthesia and Pain Medicine, and the American Society of Anesthesiologists’ Committee on Regional Anesthesia, Executive Committee, and Administrative Council. The Journal of Pain 17, 131–157 (2016). https://doi.org/10.1016/j.jpain.2015.12.008
- Waldron, N. H., Jones, C. A., Gan, T. J., Allen, T. K. & Habib, A. S. Impact of perioperative dexamethasone on postoperative analgesia and side-effects: systematic review and meta-analysis. British Journal of Anaesthesia 110, 191–200 (2013). https://doi.org/10.1093/bja/aes431
- Nir, R.-R. et al. Preoperative preemptive drug administration for acute postoperative pain: A systematic review and meta-analysis. European Journal of Pain 20, 1025–1043 (2016). https://doi.org/10.1002/ejp.842