Which of the following opioids is a metabolite of oxycodone that is three times more potent than oral morphine?

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Oxymorphone is a metabolite of oxycodone that is available as parenteral short- and long-acting oral dose forms.It is three times more potent than oral morphine and provides adequate pain relief in cancer patients that have been switched from long-acting morphine or oxycodone.Codeine has a relatively weak analgesic action compared with morphine,hydromorphone,hydrocodone,or even oxycodone.Hydrocodone is a synthetic opioid that is metabolized to hydromorphone after oral administration.Hydromorphone is more potent that morphine and better absorbed orally,but it tends to produce similar adverse reactions.

Which of the Following Opioids Is a Metabolite of Oxycodone