One published study indicates people taking the arthritis drug Vioxx had a 24% higher risk of heart attack than those taking Celebrex, but only during the first 90 days of treatment. Vioxx manufacturer Merck & Co. said the study is not the final word on the subject and that other studies showed no different results from a placebo. The author agreed the data should not cause people to discontinue the medicine and said the elevation of risk only during the first three months may be because people susceptible to side effects are going to have them early.

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