After five years of Bob Dole commercials and veritable Viagra-mania, it's hard to believe that the pill that made "erectile dysfunction" a household phrase got its start as a potential treatment for chest pain. Today Viagra is the leading drug for impotence, with worldwide sales of $1.7 billion. Its manufacturer, Pfizer, boasts that nine of the little blue pills are popped every second.
Soon pill poppers in the U.S. will have some new options. The Food and Drug Administration approved Levitra last week as a treatment for impotence. The drug, from GlaxoSmithKline and Bayer, works pretty much as Viagra does, increasing...
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