US regulators are expected to decide Tuesday whether to approve a drug nicknamed the "female Viagra," which would be the first pill on the market to raise women's sex drive. In June, an advisory panel to the Food and Drug Administration urged regulators to approve the drug, flibanserin, after previously voting against it twice in years past. This time, the experts voted 18-6 in favor of allowing the drug on the market, but with some additional risk-control measures to make sure doctors prescribe it only to patients who need it and that women are aware of the risks. The FDA...