Percocet is the same drug as oxycontin just a weaker strength mixed with acetaminophen(tylenol). Both contain oxycodone and are equally addictive. Both are opiates just like heroin.
"From 1898 through to 1910 heroin was marketed as a non-addictive morphine substitute and cough medicine for children. Bayer marketed heroin as a cure for morphine addiction before it was discovered that heroin is converted to morphine when metabolized in the liver, and as such, "heroin" was basically only a quicker acting form of morphine."