10 Oxycontin Withdrawal Symptoms Not unlike heroin, Oxycontin, a Schedule II opiate class narcotic, carries a high risk for abuse and addiction. Oxycontin works as a pain reliever for conditions involving moderate to severe pain. According to the University of Maryland, Oxycontin produces pain-relieving effects for up to 12 hours on a time-release basis. The … Continue reading 10 Oxycontin Withdrawal Symptoms