Oxycodone is available as a controlled-release tablet, intended to be taken every 12 hours. A July 1996 study independent of Purdue Pharma, the drug's originator, found the controlled-release formulation had a variable duration of action ranging from 10 to 12 hours. A 2006 review found that controlled-release oxycodone is comparable to immediate-release oxycodone, morphine, and hydromorphone in management of moderate to severe cancer pain, with fewer side effects than morphine
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