OxyContin and Percocet contain the same active opioid, oxycodone, so milligram for milligram the painkiller is identical. The difference in strength comes down to how much oxycodone is in each pill and how it enters your bloodstream. OxyContin tablets range from 10 mg to 80 mg of oxycodone, while Percocet tablets typically contain 2.5 mg to 10 mg. That means a single OxyContin pill can deliver up to eight times more oxycodone than the strongest Percocet tablet.
Same Drug, Different Delivery
Both medications use oxycodone as their painkiller. Oxycodone is roughly 1.5 times as potent as morphine when taken by mouth, making it one of the stronger prescription opioids available. What separates OxyContin from Percocet isn’t the chemical itself but two key design choices: the dose loaded into each tablet and the speed at which it releases.
OxyContin is an extended-release tablet. It slowly meters out its oxycodone over about 12 hours, which is why it comes in such high doses. You take it on a fixed schedule, typically twice a day, to maintain a steady level of pain control. Percocet is immediate-release. It hits peak blood levels in about one hour, provides relief for four to six hours, and is taken as needed throughout the day.
Percocet also contains acetaminophen (the active ingredient in Tylenol) alongside its oxycodone. That acetaminophen adds a modest boost to pain relief through a completely different mechanism, but it also puts a ceiling on how many pills you can safely take in a day. The maximum safe acetaminophen intake is 4,000 mg per day across all sources, and going over that threshold risks serious liver damage. This built-in limit is one reason Percocet doses stay relatively low.
Why OxyContin Doses Are So Much Higher
OxyContin tablets come in seven strengths: 10, 15, 20, 30, 40, 60, and 80 mg. The 60 mg and 80 mg tablets are reserved for patients who have already built up tolerance to opioids, specifically people who have been taking a comparable amount of an immediate-release opioid daily for at least a week. A doctor won’t start a new patient on those higher doses.
Percocet, by contrast, tops out at 10 mg of oxycodone per tablet. Because it releases all of its oxycodone at once, a higher single dose would spike blood levels dangerously high. OxyContin can pack 80 mg into one pill only because the extended-release coating parcels it out gradually. The total oxycodone exposure over 12 hours is large, but the concentration in your blood at any given moment stays more controlled than if you swallowed that amount in immediate-release form.
To put the timing in concrete terms: FDA pharmacology data shows that immediate-release oxycodone/acetaminophen reaches peak blood concentration in roughly one hour, while an extended-release formulation of the same dose takes about two to three hours. That slower ramp-up is the whole point of extended-release design.
When Each One Gets Prescribed
CDC prescribing guidelines are clear that immediate-release opioids like Percocet should be the starting point for acute, short-term, or new pain. Extended-release opioids like OxyContin are reserved for severe, continuous pain that requires around-the-clock management. Doctors are advised not to start any patient on an extended-release opioid and not to prescribe them for intermittent or as-needed use.
In practice, this means Percocet is the medication you’re more likely to encounter after surgery, a dental procedure, or an injury. OxyContin is prescribed when pain is constant, such as in advanced cancer or certain chronic conditions, and when lower-strength, shorter-acting opioids are no longer providing adequate relief. Moving from Percocet to OxyContin generally signals that a patient’s pain is severe enough to need continuous coverage and that they’ve already demonstrated they tolerate opioids at a meaningful dose.
The Acetaminophen Factor
Percocet’s acetaminophen component works through a different pathway than oxycodone. It reduces pain and fever without the sedation, euphoria, or respiratory depression that opioids cause. For mild to moderate pain, the combination can be more effective than oxycodone alone at lower doses, which is why the pairing exists. But it comes with its own risk.
Because acetaminophen is found in dozens of over-the-counter products like cold medicines, sleep aids, and headache tablets, it’s surprisingly easy to exceed the daily limit without realizing it. If you’re taking Percocet, you need to account for every other source of acetaminophen in your medicine cabinet. Liver damage from acetaminophen overdose can be severe and, in some cases, fatal. OxyContin doesn’t carry this particular risk because it contains no acetaminophen.
Abuse-Deterrent Features
Modern OxyContin tablets are formulated with abuse-deterrent technology. The pills are designed to resist crushing (which could allow snorting) and to turn into a thick gel when dissolved in liquid (which would prevent injection). These physical barriers don’t make the drug impossible to misuse, but they target the most common methods. Percocet does not currently have abuse-deterrent properties, though its lower oxycodone content makes each individual pill less attractive for misuse.
The high oxycodone load in OxyContin, ranging up to 80 mg per tablet, is what historically made it a target for diversion and misuse. The DEA has specifically noted that the large amount of oxycodone in controlled-release formulations makes them highly attractive to people seeking to abuse opioids. The reformulated version with abuse-deterrent features was designed to address exactly this problem.
Bottom Line on Strength
If you’re comparing a single pill of each at their maximum available dose, OxyContin is dramatically stronger: 80 mg versus 10 mg of the same opioid. But that comparison is somewhat misleading, because the two drugs aren’t prescribed for the same situations or taken on the same schedule. A person taking Percocet every four to six hours could accumulate a significant daily oxycodone dose across multiple pills, while someone on OxyContin takes just two pills a day.
The more useful way to think about it: OxyContin delivers more oxycodone per tablet, releases it over a longer window, and is prescribed for more severe pain. Percocet delivers less oxycodone per tablet, acts faster, wears off sooner, and includes acetaminophen as a secondary painkiller. They sit at different points on the same spectrum, with OxyContin occupying the higher end in both dose and intended severity of pain.