Well, well, well: It turns out Viagra may have some use for women -- but it's not what you think. The erectile dysfunction drug that's become one of the top-selling pharmaceuticals for men has been found to help greatly relieve menstrual cramps. Really!

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Here's the kicker: The drugs have to be vaginally administered in order to work. According to the study, the drugs work by dilating the blood vessels in the pelvic region. Taking the drug orally was found to have too many side effects -- most notably headaches -- so vaginal administration is recommended.

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Before doctors will give Viagra the complete seal of approval for the treatment of menstrual pain, more research will need to be done, especially to see if the drug changes the menstrual bleeding pattern. Stay tuned ... [Science Daily]