Buy oxycodone online, Oxy, sold under brand name OxyContin among others, is an opioid medication used for treatment of moderate to severe pain. It is usually taken by mouth, and is available in immediate release and controlled release formulations. Onset of pain relief typically begins within 15 minutes and lasts for up to six hours with the immediate release formulation. In the United Kingdom, it is available by injection. Combination products are also available with paracetamol (acetaminophen) or aspirin.