Is oxycodone a form of morphine?

No, they are two different opiates, but in the brain when one has just took oxycodone/contin all opiates are transduced into morphine, so in other Words the brain detects the opiate, but it doesn't see it as oxycodone, it see it as morphine. Morphine has better pain killing effects, and Oxycontin is the best recreational opiate available by far.