What is Viagra?

Viagra is a prescription medication developed by the pharmaceutical company Pfizer and appeared on the market since 1998.viagra Viagra was the first drug used to treat sexual impotence. Viagra is the drug for the treatment of erectile dysfunction (male impotence), used by over 16 million men worldwide. Taken about 30 minutes before sexual intercourse, Viagra allows you to achieve and maintain erection for the next 4 / 5 hours after.

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