Oxycontin is used to help relieve severe ongoing pain. It is a part of Opioid analgesics. It works in the brain to change how your body feels and responds to pain. OxyContin is available as a 10 milligram (mg), 20 mg, 40 mg, or 80 mg tablet. The tablets vary in color and size according to dosage. The tablets are imprinted with the letters OC or OP on one side and the number of milligrams on the opposite side. OxyContin tablets have a controlled-release feature and are designed to be swallowed whole. The variants are:-