Shares in Roche and subsidiary Chugai pharmaceuticals fell on European markets Monday after reports that Japan's Ministry of Health is investigating two deaths linked to the antiviral Tamiflu. Officials said two teenagers are believed to have committed suicide after taking the drug. Known side effects include "impaired consciousness, hallucinations and other abnormal behavior." Tamiflu has been among the hottest sellers on the market in the past few months as governments and individuals have built up vast stockpiles to guard against a possible outbreak of the H5N1 virus.
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