GlaxoSmithKline Flu Shot May Raise Adult Narcolepsy Risk

Published: May 23, 2013

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GlaxoSmithKline Plc's H1N1 pandemic flu shot may put adults at higher risk of developing narcolepsy, not only children as previous studies found, Finland's National Institute for Health and Welfare said on Thursday. Growing evidence of a link between GSK's Pandemrix vaccine and an increase in narcolepsy, a rare sleep disorder, among children who received it in Europe has delayed approval of a similar vaccine in the United States. Data published this year in the British Medical Journal found that children in England who had been vaccinated with Pandemrix during the 2009-10 H1N1 swine flu pandemic had a 14-fold higher risk of developing narcolepsy, equating to about one in 50,000.

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