Endocet is a narcotic pain reliever that contains a combination of acetaminophen and oxycodone. As an opioid medication, it is generally prescribed for moderate to severe pain relief. However, for various reasons, patients may prefer alternative pain relievers or their physicians may choose to prescribe alternative medications. Synonyms for Endocet include Percocet, Tylox, Roxicet, Combunox, and OxyContin. Percocet and Tylox are also combinations of oxycodone and acetaminophen. Roxicet is a solution form of the medication. Combunox combines oxycodone and ibuprofen. OxyContin, on the other hand, contains only oxycodone and is classified as a Schedule II drug. Doctors and patients must exercise caution and follow guidelines for the safe use of all prescription medications.