OxyContin OP 30 mg (OP 30 pill) is part of the opioid family and is the controlled-release capsule form of Oxycodone. It is a powerful, long-lasting opioid medication specifically designed to ease pain. This drug comes under the brand name of the opioid Oxycodone Hydrochloride, which is used to manage pain severe enough to require daily use, when other pain treatments such as non-opioid pain medicines are not effective.