The "little blue pill" — Viagra — turns 10 on Thursday. On March 27, 1998, the Food and Drug Administration gave pharmaceutical company Pfizer the go-ahead to sell what would become one of the world's best-known pills.
In Viagra's first month on the market, doctors wrote more than 500,000 prescriptions. Former presidential candidate Bob Dole once plugged the pill in TV commercials.
The drug has been a long-term boost for Pfizer's profits. Last year, it brought the pharmaceutical giant more than $1.7 billion.