OxyContin and Percocet contain the exact same opioid: oxycodone. Milligram for milligram, the opioid component is identical in strength. The difference isn’t potency but formulation. OxyContin delivers oxycodone alone in an extended-release tablet, while Percocet combines a smaller dose of oxycodone with 325 mg of acetaminophen (the active ingredient in Tylenol) in an immediate-release tablet. That distinction changes how each drug hits, how long it lasts, and what risks come with it.
Same Opioid, Different Packaging
When people say “oxy,” they usually mean OxyContin, which is a brand name for extended-release oxycodone. Percocet is a brand name for immediate-release oxycodone combined with acetaminophen. Both are Schedule II controlled substances under the DEA, meaning they carry the same legal classification for abuse potential.
Oxycodone is roughly 1.5 times as potent as morphine, whether it comes in OxyContin or Percocet. A 10 mg dose of oxycodone from either pill produces the same pain-blocking effect in your body. So the question isn’t really which drug is “stronger” but which one delivers more oxycodone per dose and over what timeframe.
How Dosage Ranges Compare
This is where the practical difference shows up. Percocet comes in four tablet strengths: 2.5 mg, 5 mg, 7.5 mg, and 10 mg of oxycodone, each paired with 325 mg of acetaminophen. It’s typically taken one tablet every six hours as needed. That means the maximum oxycodone from Percocet in a single dose tops out at 10 mg.
OxyContin, on the other hand, is available in strengths ranging from 10 mg all the way up to 80 mg per tablet, taken every 12 hours. An 80 mg OxyContin tablet contains eight times the oxycodone found in a maximum-strength Percocet. So while the drug itself isn’t more potent, OxyContin is prescribed at much higher doses, which makes the overall effect significantly stronger for patients on the upper end of the dosing range.
Onset and Duration
Percocet is immediate-release, so it kicks in faster. You’ll typically feel the effects within 15 to 30 minutes, and the pain relief lasts about four to six hours before you need another dose.
OxyContin is engineered to release oxycodone slowly over 12 hours. Peak blood levels don’t arrive until roughly four to five hours after swallowing the tablet. The tradeoff is convenience and steady coverage: two pills a day instead of four, with more consistent pain control and fewer peaks and valleys in how you feel throughout the day. The elimination half-life of OxyContin is also slightly longer (about 4.5 hours versus 3.2 hours for immediate-release oxycodone), meaning the drug clears your system more gradually.
The Acetaminophen Factor
Percocet’s acetaminophen component is both a benefit and a limitation. Acetaminophen works through a different mechanism than opioids, reducing pain signals through pathways that don’t involve opioid receptors. Combining the two can improve pain relief at lower opioid doses, which is why Percocet is commonly prescribed for shorter-term pain like recovery from dental surgery or an injury.
The limitation is liver safety. The FDA sets the maximum recommended daily acetaminophen intake at 4,000 mg across all sources, including over-the-counter cold medicines or headache pills you might also be taking. Each Percocet tablet contains 325 mg of acetaminophen, so four tablets a day puts you at 1,300 mg from Percocet alone. That leaves room, but not much if you’re also reaching for Tylenol. This ceiling on acetaminophen effectively caps how much Percocet you can safely take in a day, which is one reason it’s not used for chronic, around-the-clock pain management.
When Each One Is Prescribed
Percocet is typically prescribed for acute, short-term pain: after surgery, for a broken bone, or during recovery from a procedure. The idea is to manage a temporary spike in pain with a combination pill that works quickly and keeps the opioid dose relatively low.
OxyContin is reserved for situations where someone needs continuous opioid pain relief over an extended period and has already been taking opioids, so their body has some tolerance. It’s not a first-line choice for a sprained ankle or a wisdom tooth extraction. The high-dose tablets (40 mg and above) are specifically intended for patients who are already opioid-tolerant, because those doses can be dangerous or fatal for someone whose body isn’t accustomed to opioids.
Abuse-Deterrent Design
The current formulation of OxyContin includes abuse-deterrent technology. If someone tries to crush or dissolve the tablet to snort or inject it, the pill is designed to resist those methods, turning into a gummy substance instead of a powder. The FDA has recognized OxyContin’s labeling for these abuse-deterrent properties. Percocet does not include this type of formulation.
That said, these technologies have a significant limitation: they don’t prevent the most common form of misuse, which is simply swallowing more pills than prescribed. The deterrent targets injection and snorting, not oral overconsumption.
The Bottom Line on Strength
If you’re comparing one molecule to another, there’s no difference. Oxycodone is oxycodone. But in practice, OxyContin delivers higher total doses of that same molecule over a longer period, making it the more powerful prescription in terms of overall opioid exposure. A person taking 80 mg of OxyContin twice daily is getting 160 mg of oxycodone per day. A person on Percocet 10 mg four times daily is getting 40 mg. That’s a fourfold difference in daily opioid load, not because the drug is stronger, but because the formulation allows for it.