Other forms of oxycodone have a special coating that makes just a little bit of the medicine get released into the body at a time. A small amount of oxycodone is released, non-stop, into the body for up to 12 hours. The goal is to have the same amount of painkiller in the body all the time. These are called long-acting, extended-release, or controlled-release forms of oxycodone. They do not start working quickly, but they last a long time. The most common brand name for controlled-release oxycodone is OxyContin.