A pink pill designed to boost sex drive in women -- the latest attempt by the drug industry to find a female equivalent to Viagra -- fell short in two studies, federal health regulators said Wednesday.

The Food and Drug Administration is considering Boehringer Ingelheim's drug flibanserin for premenopausal women who report a lack of sexual desire, a market that drugmakers have been targeting for more than a decade since the blockbuster success of Viagra in men.

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