Endocet and Percocet contain the same two active ingredients in the same doses: oxycodone (a prescription opioid painkiller) and acetaminophen (the active ingredient in Tylenol). Endocet is a branded generic version of Percocet, meaning it works the same way but typically costs far less. If your pharmacy switches you from one to the other, you’re getting the same medication.
Same Active Ingredients, Same Strengths
Both Endocet and Percocet combine oxycodone with acetaminophen. The oxycodone targets pain signals in the brain and spinal cord, while the acetaminophen boosts pain relief through a separate pathway. Both medications come in four core strength combinations, all paired with 325 mg of acetaminophen:
- 2.5 mg oxycodone / 325 mg acetaminophen
- 5 mg oxycodone / 325 mg acetaminophen
- 7.5 mg oxycodone / 325 mg acetaminophen
- 10 mg oxycodone / 325 mg acetaminophen
Percocet has historically been available in a couple of additional combinations with higher acetaminophen content (7.5 mg/500 mg and 10 mg/650 mg), though the lower-acetaminophen versions are now standard. For the overlapping strengths, the amount of active drug reaching your bloodstream is identical.
Where They Differ: Inactive Ingredients
The meaningful difference between Endocet and Percocet lies in the inactive ingredients, the fillers, binders, and dyes that hold the tablet together and give it its shape and color. Endocet tablets contain colloidal silicon dioxide, croscarmellose sodium, microcrystalline cellulose, povidone, pregelatinized cornstarch, and stearic acid. Different strengths use different coloring agents: the 2.5 mg tablet contains a red dye, the 7.5 mg uses a yellow-orange dye, and the 10 mg uses a different yellow dye.
Percocet uses its own set of inactive ingredients, which vary by manufacturer and formulation. These differences don’t change how the drug works for the vast majority of people. In rare cases, someone with a sensitivity or allergy to a specific dye or filler might tolerate one version better than the other. If you’ve had an unusual reaction after switching between the two, the inactive ingredients are the most likely explanation.
Why the Price Gap Is So Large
The cost difference between Endocet and Percocet is dramatic. At retail prices without insurance, 100 tablets of Endocet run roughly $125, while 100 tablets of brand-name Percocet can cost over $3,000. That puts Endocet at about $1.25 per tablet versus $30 per tablet for Percocet.
This price difference reflects the brand-name premium, not a difference in quality or effectiveness. The FDA requires generic and branded generic medications to deliver the same active ingredient at the same concentration into the bloodstream. Most pharmacies will automatically dispense Endocet or another generic version unless a prescriber specifically writes “brand name only” on the prescription.
Do They Feel Different?
Some people report that one version seems to work slightly better or causes fewer side effects than the other. This is a real experience, but it’s not caused by differences in the active drug. Small variations in how quickly a tablet dissolves, driven by those different binders and fillers, can subtly affect how fast the medication kicks in or how your stomach handles it. Individual body chemistry also plays a role.
Both carry the same side effect profile: drowsiness, constipation, nausea, dizziness, and lightheadedness are the most common. Both carry the same risk of dependence and respiratory depression that comes with any opioid medication. Neither version is safer or more dangerous than the other in this regard.
Acetaminophen Limits Apply to Both
Because both Endocet and Percocet contain acetaminophen, the same liver safety ceiling applies regardless of which one you take. The FDA sets the maximum at 4,000 mg of total acetaminophen per day for adults, from all sources combined. That means if you’re taking either of these medications, you need to account for any other acetaminophen you might be using, including over-the-counter cold medicines, headache remedies, or sleep aids that often contain it as a hidden ingredient.
At the standard 325 mg per tablet, you’d hit that ceiling at about 12 tablets per day from the medication alone. Prescribed doses rarely approach that number, but the risk increases when people take additional acetaminophen products without realizing it.
Switching Between the Two
If your pharmacy has been dispensing Percocet and switches you to Endocet, or vice versa, the transition is straightforward. The dosing stays the same, and no tapering or adjustment period is needed. The tablet will look different in size, shape, and color, which can be alarming if you’re not expecting it. Checking the imprint code on the tablet against your prescription label confirms you have the right medication.
If you have a strong preference for one version, you can ask your prescriber to note that on the prescription. Keep in mind that requesting brand-name Percocet specifically will typically mean a much higher out-of-pocket cost, even with insurance.