Buy Oxycontin 30mg Online, Oxycontin is a prescription opioid painkiller used to treat moderate to severe pain. It's an extended-release formulation of oxycodone, which is chemically similar to heroin and morphine. Oxycodone also belongs to a class of drugs called narcotics or opiates. Oxycontin is a controlled substance and should not be used by anyone who has not been prescribed it by a doctor or nurse practitioner (NP). People who are addicted to narcotics may be able to obtain the drug on their own without medical supervision, but this does not mean that they should do so without first consulting with their doctor about whether or not Oxycontin might be right for them.