Buying OxyContin oc 5 mg online is typically prescribed for chronic pain management, particularly for patients who require long-term treatment. The extended release formulation is designed to provide consistent pain relief over a 12-hour period.The 5 mg tablet is a lower dose, often prescribed for patients who are opioid-naive or those who require a lower amount of pain relief. It should be taken as directed by a healthcare provider, usually every 12 hours. Oxycodone binds to opioid receptors in the brain and spinal cord, altering pain perception and the emotional response to pain.