A pill stamped “10/325” contains 10 milligrams of oxycodone and 325 milligrams of acetaminophen, a prescription-only combination painkiller most widely recognized under the brand name Percocet. The two numbers refer to the dose of each active ingredient: the opioid component (oxycodone) and the over-the-counter pain reliever (acetaminophen, the same drug in Tylenol). It is a Schedule II controlled substance in the United States, meaning it carries a high potential for misuse and dependence, and it cannot be legally obtained without a prescription.
What the Imprint Tells You
Prescription pills sold in the United States are required to carry unique imprints so they can be identified. On a 10/325 oxycodone-acetaminophen tablet, the numbers “10” and “325” typically appear on one or both sides of the pill, sometimes separated by a score line. The exact shape, color, and additional markings vary by manufacturer. Generic versions are far more common than the branded Percocet tablet, so you may see round white pills, oblong yellow ones, or other configurations depending on which company made them. If you find a loose pill and want to confirm what it is, the FDA’s online pill identifier or a pharmacist can match the full set of markings to a specific product and manufacturer.
The 10/325 strength is the highest standard dose of oxycodone available in this combination. Other common strengths include 2.5/325, 5/325, and 7.5/325, all paired with the same 325 mg of acetaminophen. That acetaminophen ceiling exists for a regulatory reason discussed below.
Why Two Drugs in One Pill
Combining an opioid with acetaminophen is not just a convenience. The two drugs relieve pain through different pathways, and together they tend to work better than either one alone at the same doses. Oxycodone acts on opioid receptors in the brain and spinal cord, dampening pain signals and altering the emotional response to pain. Acetaminophen works centrally as well, though its exact mechanism is still debated; it appears to affect pathways involved in pain processing and fever regulation without the anti-inflammatory effects of ibuprofen or naproxen.
A Cochrane systematic review of acute postoperative pain trials found that oxycodone 10 mg combined with acetaminophen 650 mg provided meaningful pain relief (at least a 50% reduction) with an NNT of 2.7, meaning roughly three patients need to take the combination for one to get that level of relief who would not have gotten it from a placebo. When oxycodone 15 mg was used alone, the NNT rose to 4.6, a notably weaker performance despite the higher opioid dose. The combination also lasted longer: about 10 hours of relief at the higher combination dose compared with around 4 hours at half that dose.1PubMed Central. Single dose oral oxycodone and oxycodone plus paracetamol (acetaminophen) for acute postoperative pain in adults This is the practical rationale for using a combination pill: you get better, longer-lasting pain control with a lower opioid dose than you would need if the opioid were acting alone.
When Doctors Prescribe It
Oxycodone/acetaminophen 10/325 is typically reserved for moderate to severe acute pain when non-opioid options are not enough. Common scenarios include recovery from surgery, dental extractions involving bone impaction, traumatic injuries, and certain cancer-related pain. A clinical trial specifically testing the 10/325 formulation enrolled patients recovering from oral surgery who had at least moderate persistent pain. The study compared a single dose of oxycodone 10 mg/acetaminophen 325 mg against controlled-release oxycodone 20 mg (double the opioid dose) and a placebo, finding the combination effective for this kind of acute postsurgical pain.2PubMed. Randomized, double-blind, placebo-controlled comparison of the analgesic efficacy of oxycodone 10 mg/acetaminophen 325 mg versus controlled-release oxycodone 20 mg in postsurgical pain
Because 10/325 is the highest combination strength, it often represents a step up from lower-dose versions when pain is not adequately controlled. In most prescribing guidelines, it is not meant for long-term daily use. The expectation is that pain will diminish over days or a few weeks and the patient will taper off. When pain persists beyond that window, doctors generally reevaluate whether the underlying cause can be treated differently rather than simply continuing the opioid.
The Acetaminophen Ceiling and Liver Risk
The “325” in 10/325 exists because of a deliberate FDA decision. Before 2011, combination opioid-acetaminophen products could contain up to 500 or even 750 mg of acetaminophen per tablet. The problem was that patients taking multiple doses a day, sometimes alongside over-the-counter Tylenol or cold medicines that also contain acetaminophen, could easily exceed the safe daily limit and damage their livers without realizing it. Acetaminophen is the leading cause of acute liver failure in the United States, and a significant share of those cases involved people who did not know they were doubling up.
In January 2011, the FDA announced a mandate requiring manufacturers to cap acetaminophen at 325 mg per tablet in all prescription combination opioid products, with full compliance required by March 2014. A subsequent analysis found that this mandate was associated with a meaningful decrease in hospitalizations and in the proportion of acute liver failure cases linked to acetaminophen-opioid toxicity each year.3PubMed Central. Association of FDA Mandate Limiting Acetaminophen (Paracetamol) in Prescription Combination Opioid Products and Subsequent Hospitalizations and Acute Liver Failure The 325 mg cap means a patient taking the maximum of six tablets per day hits 1,950 mg of acetaminophen, which is under the general 4,000 mg daily ceiling for healthy adults. But that math breaks down fast if you add a couple of Tylenol tablets, a dose of NyQuil, or another acetaminophen-containing product.
This is where a surprisingly common knowledge gap comes in. A survey exploring public awareness of acetaminophen found that roughly 70% of respondents did not realize that certain widely sold combination products contained acetaminophen at all. About a quarter of participants believed acetaminophen causes only low toxicity.4PubMed Central. Exploring public knowledge and perceptions regarding per os OTC pain-relieving medications: the case of paracetamol (acetaminophen) If you are taking a 10/325 pill, the single most important safety habit is checking every other medication you use for hidden acetaminophen. It shows up in migraine medicines, sleep aids, allergy and cold formulas, and plenty of other products that do not advertise it on the front of the box.
Alcohol and Other Dangerous Interactions
Mixing oxycodone/acetaminophen with alcohol is risky on two separate fronts. Alcohol enhances the sedation and respiratory depression caused by opioids, meaning even a couple of drinks can push you closer to a dangerous slowdown in breathing. Separately, alcohol and acetaminophen compete for the same liver detoxification pathways, and chronic alcohol use increases the liver’s production of a toxic acetaminophen byproduct. A review of ethanol’s effects on drug toxicity identified several high-risk situations for dangerous interactions: older adults, people on multiple medications, those with alcohol-related liver disease, and anyone combining central nervous system depressants like opioids with alcohol.5PubMed Central. Ethanol as a Modifier of Drug Toxicity in Humans: Pathways of Toxicity and Organ-Level Consequences In short, alcohol magnifies both the opioid risk and the liver risk simultaneously.
Oxycodone is processed in the liver primarily by two enzyme families, CYP2D6 and CYP3A4.6PubMed Central. Exposure to oral oxycodone is increased by concomitant inhibition of CYP2D6 and 3A4 pathways, but not by inhibition of CYP2D6 alone Other medications that block or slow these enzymes can cause oxycodone to build up in the blood to higher-than-expected levels, amplifying both its pain-relieving and its dangerous effects. Some common culprits include certain antifungal drugs, certain antibiotics, and some antidepressants. On the flip side, drugs that speed up CYP3A4 activity, like certain seizure medications or the herbal supplement St. John’s wort, can reduce oxycodone’s effectiveness by clearing it from the body too quickly. If your doctor prescribes 10/325, always review your full medication list including supplements with the pharmacist.
Dependence, Tolerance, and the Risk of Addiction
Oxycodone, like all opioids, can produce physical dependence relatively quickly. Dependence means your body adapts to the drug’s presence, and stopping abruptly triggers withdrawal symptoms such as muscle aches, anxiety, sweating, and insomnia. Tolerance, a related but distinct phenomenon, means the same dose becomes less effective over time, which can lead to dose escalation if not carefully managed. Neither dependence nor tolerance is the same as addiction, though they can be stepping stones. Addiction involves compulsive use despite harmful consequences and is considered a chronic brain disorder.
Research into opioid use disorder suggests that while men historically have higher overall rates of opioid misuse, women may develop dependence more quickly and appear to be more susceptible to the addictive properties of opioids.7PubMed Central. Molecular Sex Differences and Clinical Gender Efficacy in Opioid Use Disorders: From Pain Management to Addiction This does not mean men are at low risk. It means that the trajectory toward dependence can vary, and shorter prescriptions at the lowest effective dose remain the standard harm-reduction strategy regardless of who you are.
If you have been taking 10/325 for more than a few weeks and want to stop, do not quit cold turkey. A gradual taper under medical supervision reduces the severity of withdrawal symptoms and is the standard approach. Your doctor can outline a schedule that typically involves small dose reductions every few days or weeks depending on how long you have been on the medication.
Counterfeit Pills and the Fentanyl Crisis
One of the most dangerous developments in the drug landscape over the past decade is the flood of counterfeit prescription pills. Fake tablets that look identical to legitimate oxycodone/acetaminophen 10/325 pills are pressed in illicit labs and sold on the street or through informal channels. The critical difference is what is inside them: many contain illicitly manufactured fentanyl, a synthetic opioid roughly 50 to 100 times more potent than morphine by weight. A tiny miscalculation in the amount pressed into each tablet can produce a lethal dose.
A published case report described an otherwise healthy adolescent who was found unresponsive after ingesting approximately three to four fake oxycodone 10/325 pills that turned out to be laced with fentanyl. The result was severe brain injury affecting multiple regions.8PubMed Central. Diffuse subcortical white matter injury and bilateral basal ganglia neuronal loss after acute opioid overdose Cases like this are not rare anecdotes; fentanyl-laced counterfeit pills have become a leading driver of overdose deaths in the United States. The pills can be nearly impossible to distinguish from legitimate ones by appearance alone.
The practical takeaway is stark: if a pill was not dispensed to you directly from a licensed pharmacy with your name on the label, you cannot be sure of what is in it. No visual inspection, no taste test, and no trusting the seller can substitute for a verified supply chain. Fentanyl test strips, which are inexpensive and legal in most states, can detect the presence of fentanyl in a substance, though they are not foolproof. Naloxone (brand name Narcan), an opioid-reversal medication now available over the counter, should be accessible whenever opioids of any kind are present in a household.
Pregnancy and Breastfeeding
Opioid use during pregnancy raises the risk of neonatal opioid withdrawal syndrome, a condition in which the newborn goes through withdrawal after delivery. A large study of over 48,000 opioid-exposed pregnancies found that oxycodone carried roughly twice the risk of neonatal withdrawal compared with hydrocodone, the most commonly prescribed opioid in pregnancy. Among newborns exposed to opioids in utero, about 2.2% developed the syndrome overall, but the rate was significantly higher with stronger opioid agonists like oxycodone, morphine, and methadone.9JAMA Network Open. Characteristics of Prescription Opioid Analgesics in Pregnancy and Risk of Neonatal Opioid Withdrawal Syndrome in Newborns
Neonatal withdrawal symptoms can include tremors, excessive crying, poor feeding, and sleep disturbance. Severe cases sometimes require pharmacological treatment and extended hospitalization. The same study found that strong opioid agonists were associated with roughly double the risk of withdrawal compared with weaker ones, and longer-acting opioids carried additional risk over short-acting formulations. For pregnant individuals who need pain management, the decision is not simply “no opioids ever” but rather a careful weighing of the severity of pain, the availability of alternatives, and the specific opioid chosen. That conversation belongs with an obstetrician and a pain specialist, ideally before a prescription is written.
Oxycodone does pass into breast milk in small amounts. Most guidelines advise caution, monitoring the infant for excessive sleepiness or difficulty feeding, and using the lowest effective dose for the shortest possible time if an opioid is truly needed postpartum.
Safe Storage and Disposal
Because oxycodone/acetaminophen is a controlled substance with high misuse potential, how you store and dispose of it matters. Leftover pills sitting in a medicine cabinet are a common source of diversion, meaning they end up being taken by someone other than the patient. Teenagers, visiting guests, and even household members struggling with substance use may access unsecured medications.
Store 10/325 pills in a locked container or at least somewhere not easily accessible. Keep track of how many pills are in the bottle. When you no longer need them, do not simply toss them in the trash. The FDA recommends flushing certain opioids, including oxycodone products, down the toilet if no drug take-back program is available. Many pharmacies and police stations also host periodic take-back events or have permanent drop-off boxes. The goal is to get unused pills out of circulation entirely, because every pill that lingers in a home is a pill that could be misused or accidentally ingested by a child.
Who Should Avoid This Medication
Certain people should not take oxycodone/acetaminophen at all, and others need adjusted doses and close monitoring. The most obvious group to avoid it entirely is anyone with a known allergy to either component. Beyond that, people with severe liver disease are at particular risk because acetaminophen is processed by the liver and oxycodone relies on hepatic enzymes for metabolism. Individuals with severe respiratory conditions, including uncontrolled asthma or chronic obstructive pulmonary disease, face heightened risk of respiratory depression from the opioid component.
Older adults metabolize drugs more slowly in general, and oxycodone is no exception. Starting doses in elderly patients are typically lower, and the interval between doses may be extended. People with kidney impairment also need dose adjustments, since the body may not clear the drug and its metabolites efficiently. Anyone with a personal or family history of substance use disorder should discuss this openly with their prescriber, as the risk of developing problematic use is higher in this group. Alternative pain management strategies, including non-opioid medications, nerve blocks, and physical therapy, are often worth exploring before reaching for a 10/325 prescription.
Recognizing an Overdose
An overdose on oxycodone/acetaminophen can involve two different emergencies happening at once. Opioid overdose shows up as extreme drowsiness, pinpoint pupils, slow or shallow breathing, blue-tinged lips or fingernails, and unresponsiveness. Acetaminophen overdose, by contrast, is sneakier: early symptoms may be limited to nausea and vomiting, and serious liver damage may not become apparent for 24 to 72 hours. A person can appear relatively stable in the first hours after an acetaminophen overdose and then deteriorate rapidly.
If you suspect an opioid overdose, call emergency services immediately and administer naloxone if available. Naloxone works within minutes to reverse opioid-induced respiratory depression, but its effects are temporary, so medical follow-up is still essential. For suspected acetaminophen poisoning, the hospital treatment is N-acetylcysteine, an antidote that is most effective when given within 8 hours of ingestion but can still help later. The dual-threat nature of this combination pill means that emergency responders need to address both components, not just the one that looks more dramatic in the moment.
The Bigger Landscape of Combination Opioids
Oxycodone/acetaminophen is far from the only combination opioid on the market. Hydrocodone/acetaminophen (brand name Vicodin or Norco) is actually prescribed more frequently and comes in similar strength configurations. Codeine/acetaminophen (Tylenol #3) is weaker and considered a Schedule III drug. Each combination has a somewhat different side effect profile and potency, but all share the same fundamental risks: opioid dependence, respiratory depression, and acetaminophen-related liver injury at high cumulative doses.
The trend in acute pain management has shifted toward what clinicians call multimodal analgesia, using several different types of pain-relieving drugs and techniques so that no single agent has to do all the work. Alternating acetaminophen with ibuprofen, adding a nerve block for surgical pain, or incorporating physical modalities like ice and elevation can reduce the total amount of opioid needed. For many patients recovering from surgery, a short course of a lower-strength combination, say 5/325, combined with scheduled ibuprofen provides relief comparable to a higher-dose opioid regimen while lowering the risk of side effects and dependence. The 10/325 pill remains a legitimate tool for severe pain, but the medical consensus is that it should be one option in a toolkit, not the default first choice.