The brand name Oxycontin refers to a prescription medication that contains the potent analgesic oxycontin. It is used for illnesses like cancer or to alleviate moderate to severe pain, frequently following surgery. Oxycontin functions by altering the way your nerve system and brain react to pain.But because it's so strong dont consume directly you should need to talk to your doctor.It contains oxycodone, a medication that alters how the nerve system and brain react to pain. Doctors only recommend it when other painkillers are ineffective due to its potential for addiction. It contains oxycodone, a medication that alters how the nerve system and brain react to pain. Doctors only recommend it when other painkillers are ineffective due to its potential for addiction.