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FDA panel to review Tamiflu's effect on brain
Key Excerpts from Article on Website of USA Today

USA Today, November 25, 2007
Posted: December 10th, 2007

A Food and Drug Administration panel ... will review reports of abnormal behavior and other brain effects in more than 1,800 children who had taken the flu medicine Tamiflu since its approval in 1999, including 55 in the USA. Twenty-two of the U.S. reports were considered "serious," with symptoms such as convulsions, delirium or delusions, says Terry Hurley, spokesman for drugmaker Roche Laboratories. None of the U.S. cases resulted in death. But in Japan, Hurley says, five deaths have been reported in children under 16 as a result of neurological or psychiatric problems. "Four were fatal falls, and one was encephalitis in a patient with leukemia," he says. In addition, in people ages 17 to 21, there were two deaths in Japan, one a "fatal accident with abnormal behavior," Hurley says, and the second as a result of encephalopathy, a brain infection. Seven adult deaths attributed to neuropsychiatric problems also have been reported in Japan. The possible association between Tamiflu and neuropsychiatric effects was first reported in Japan, and in March, the Japanese government issued a safety warning restricting the drug's use in adolescents. Japan has been the major market for Tamiflu, accounting for 75% of the 48 million prescriptions written. The drug's Japanese distributor, Chugai Pharmaceutical Co., announced this month that it would cut by half the supply it had been planning to sell this winter, from 12 million to 6 million courses of treatment. In a statement, the company says demand dropped after reports in February that "several teenage patients with influenza who were also taking Tamiflu had fallen from buildings after taking the drug." A year ago Roche added a warning to its package insert label saying "people with the flu, particularly children, may be at an increased risk of self-injury and confusion shortly after taking Tamiflu," and their behavior should be monitored.

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