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VIAGRA is a prescription drug used to treat erection problems scientifically referred to as erectile dysfunction(ED) or impotence.
Viagra works for
over 80% of men if used correctly according to clinical trials. VIAGRA
has been successful for around 4 out 5 men irrespective of age or the
underlying cause of ED.
Viagra increases the blood flow to the penis. It should only be taken before sexual activity. Once taken, it takes 30 - 60 min for Viagra to start working. Therefore, you should try to take Viagra half an hour to an hour before sexual activity begins.
It is important to note that Viagra does not automatically cause an erection. Sexual arousal is required for Viagra work. Therefore, erections generally only last as long as sexual activity is maintained.
Some drugs can cause a dangerous interaction with Viagra. Therefore, it is extremely important that you tell your doctor if you are taking any drugs or supplements, including vitamins.
Viagra - Manufacturer's official viagra site
Viagra - FDA/Centre for Drug Evaluation and Research- Viagra reasearch and Viagra side effects / safety.
Viagra
General Facts Some good general facts
on Viagra and erectile dysfunction.