The FDA said it had not received reports of major problems with the painkiller, which went on the market in February, but data from a Purdue Pharma study suggested that when Palladone was taken with alcohol, it could disable the drug's gradual-release mechanism and cause serious and perhaps fatal reactions. The suspension is a blow to Purdue Pharma, which had counted on Palladone to replace its blockbuster drug OxyContin, which is facing generic competition. A Purdue spokesperson said that, while the FDA action was "unanticipated," the company "complied with their request."

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