Comparative Analgesic Efficacy of Percocet and Norco

Introduction to Analgesic Equivalence

The American College of Emergency Physicians suggests that Percocet (oxycodone/acetaminophen) and Norco (hydrocodone/acetaminophen) have essentially equivalent analgesic efficacy when given at equianalgesic doses, though oxycodone may be slightly more potent on a milligram-per-milligram basis 1, 2, 3

Equianalgesic dosing studies show no clinically meaningful difference between oxycodone and hydrocodone combination products for acute pain management, as recommended by the American College of Emergency Physicians 1, 2, 3
Two prospective randomized controlled trials directly comparing short-acting oxycodone with hydrocodone combination products found them to be equal in pain relief, doses taken, global evaluations of efficacy, and pain interference with work, according to the American College of Emergency Physicians 1, 2, 3

Oxycodone has an equivalence ratio to morphine of approximately 1:1.5-2, while hydrocodone may be approximately equipotent with oral morphine, as stated by the National Comprehensive Cancer Network 4

In general, equianalgesic doses of opioids are equally efficacious in relieving pain, regardless of their DEA classification, as suggested by the American College of Emergency Physicians 1, 2, 3
The choice between these medications should be based on factors other than potency, such as patient tolerance, side effect profile, and formulary considerations, according to the American College of Emergency Physicians 1, 2
Both medications should be prescribed at the lowest practical dose for limited duration (e.g., 1 week) when used for acute pain, as recommended by the American College of Emergency Physicians 1, 2, 3
Neither medication is inherently "stronger" in clinical practice when prescribed at appropriate doses, as stated by the American College of Emergency Physicians 1, 2, 3
The perception that Percocet is stronger may stem from its Schedule II classification versus hydrocodone's former Schedule III status, but this classification reflects abuse potential rather than analgesic efficacy, according to the American College of Emergency Physicians 1, 2, 3
Individual patient response can vary due to genetic polymorphisms affecting opioid metabolism, but this applies to both medications, as noted by the National Comprehensive Cancer Network 4

Extended-release formulations of hydromorphone and oxycodone showed no difference in either pain relief or adverse effects when dosed at equal analgesic ratios (2:5) 5
In cancer pain management, oxycodone provided similar analgesic and adverse effects to morphine, concluding these agents could be interchangeable in front-line treatment, as found by the National Comprehensive Cancer Network 6

Individual patient response can vary due to genetic polymorphisms affecting opioid metabolism (particularly CYP2D6 for hydrocodone metabolism), but this applies to both medications and cannot be predicted without genetic testing, as noted by the National Comprehensive Cancer Network 6