Looking for relief from severe pain? Buy OxyContin OC 20mg online. This medication is designed to alleviate ongoing severe pain, such as that caused by cancer. Oxycodone, the active ingredient, belongs to the opioid analgesics class and alters how the brain perceives and responds to pain. Higher strengths of OxyContin (over 40 milligrams per tablet) should be used only if you have been consistently taking moderate to large doses of opioid pain medication. Do not use OxyContin if you have severe asthma or breathing issues, or if you have a blockage in your stomach or intestines.