OxyContin is a prescription, extended-release oxycodone tablet used to manage severe, long-lasting pain when other treatments are inadequate. It works by activating opioid receptors to reduce pain signals over many hours. Because it is a powerful opioid, it carries risks of addiction, dependence, overdose, and slowed breathing. Tablets must be swallowed whole and taken only as prescribed. Misuse can be fatal and sudden stopping may cause withdrawal symptoms in patients.