Buy now : https://newlifemedix.com/pain-relief/oxycontin-op-40-mg/ OxyContin is a strong prescription pain medicine for the treatment of a serious medical condition involving severe pain. The pills are identified by OP on them meaning it's the extended-release version. This indicates that it will slowly release the medication into the body for a longer period, approximately 12 hours . It is a strong medication that should only be taken exactly as directed by a physician because improper usage can lead to major negative effects and addiction.