Oxymorphone is a metabolite of Oxycontin (i.e. oxycodone) through the cytochrome P450 2D6 (CYP2D6) after the drug is processed by the liver. It is not as potent as oxycodone.
Morphine is an opiate - narcotic pain reliever used to treat moderate to severe pain. Chemically, morphine sulfate is 7,8-didehydro-4,5α-epoxy-17-methylmorphinan-3,6α-diol sulfate (2:1) (salt)...