Oxycontin is an opioid analgesic that comes in controlled release and extended-release formulations. Oxycontin generic tablets are available under the name oxycodone. You can buy oxycontin online for severe acute or chronic pain that lasts for the long term. Doctors generally prescribe the medication to people who have used opioid analgesics before and have a tolerance for them. The medicine typically comes as ER or OC formulations; however, several manufacturers also selloxycontin IR or immedia...