OxyContin 40mg is a powerful prescription opioid medication used to manage severe, chronic pain that requires around-the-clock treatment. It is commonly prescribed for conditions such as cancer pain, major injuries, or post-surgical recovery when other treatments are ineffective. OxyContin works by altering how the brain and nervous system respond to pain. This extended-release formulation provides continuous relief for up to 12 hours. It should only be used under strict medical supervision due to its high potential for addiction.