The blockbuster drug Viagra needs no introduction; everybody knows what Viagra can do and how well it can do. But some people still not aware about the working process of this very popular drug. Lets clarify the working process of Viagra- Viagra promotes erections by relaxing the smooth muscle of the blood vessels thus increasing blood flow in the penis in response to sexual stimulation.
It does this by specifically blocking a particular enzyme (protein that assists chemical reactions) called phosphodiesterase type 5 (PDE 5). This is the enzyme that normally breaks down chemicals causing the erectile response. Therefore, by blocking the breakdown of erectile chemicals, the drug promotes a harder and more prolonged erection.
Viagra promotes penile erection only in response to sexual stimulation and has no effect in the absence of sexual stimulation. Therefore, if a healthy man took Viagra and occupied himself with usual daily activities, he would not be expected to develop an erection within the five or six hours in which the drug is active unless he involves himself into sexual stimulation.
Viagra improves erections in 78 per cent of men with erectile dysfunction regardless of the cause. Specifically, it can improve erections in 70 per cent of patients treated for hypertension and in 57 per cent of patients with diabetes.
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