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FDA Allowing Heartworm Drug For Dogs Back In US

money.cnn.com

The U.S. Food and Drug Administration on Thursday said it will allow a reformulated version of a Wyeth (WYE) heartworm drug for dogs back into the U.S., sparking a powerful U.S. senator to question the agency's decision.

Wyeth unit Fort Dodge Animal Health pulled the drug from the market in 2004 amid reports that 500 dogs died while taking it. The FDA's handling of the situation sparked congressional inquiry after an FDA safety officer said the agency tried to silence her when she raised concerns about the drug.

Sen. Chuck Grassley, R-Iowa, fired off a letter to FDA Commissioner Andrew von Eschenbach on Thursday expressing concerns about how the agency came to its decision to allow the drug, called ProHeart 6, back in the U.S.

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