Oxycontin is prescribed for the relief of moderate to severe pain resulting from injuries, bursitis, neuralgia, arthritis, and cancer. Oxycontin is available as a 10 milligram (mg), 20 mg, 40 mg, or 80 mg tablet. The tablets vary in colour and size according to dosage. Oxycontin tablets have a controlled release feature and are designed to be swallowed whole.