FDA staff says Merck's sleep drug effective, questions dosage

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FDA staff says Merck's sleep drug effective, questions dosage

By Toni Clarke WASHINGTON (Reuters) - Merck & Co's experimental insomnia drug suvorexant appears generally effective, according to reviewers at the U.S. Food and Drug Administration, but they questioned the company's proposed dosing levels. The reviewers posted their comments on the FDA's website on Monday, two days ahead of a meeting of outside medical experts which will advise the agency on whether or not it should approve the drug. Merck's shares fell 1.1 percent to $45.49 in midday trading. ...

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