Oxycodone 15 mg is a prescription opioid pain medication used to treat moderate to severe pain. It belongs to the class of drugs known as opioid analgesics, which work by binding to specific receptors in the brain and spinal cord, altering the perception of pain. Oxycodone is available in both immediate-release (IR) and extended-release (ER) forms, with the 15 mg dosage often prescribed for patients who have not responded well to lower doses or milder medications.