Buy Percocet Online is a medication that's meant to ease mild pain. It belongs to the opioid family, much like morphine and heroin, but it actually comes from natural sources. The main active ingredient in Percocet is Oxycodone, which is an opioid created in a lab. You can find Percocet available for purchase online, and it usually comes as a mix of acetaminophen and Oxycodone.