Wednesday, July 1, 2009

How Viagra Works

Viagra is very effective at treating erectile dysfunction. It works by blocking a chemical that causes blood to leave the penis. More blood in the penis means an improved erection.

Viagra® (sildenafil citrate) is a medication that has been licensed to treat erectile dysfunction (ED), which is the repeated inability to get or keep an erection that is firm enough for sexual intercourse.

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