What's in Viagra??!
Question:
What's in Viagra??
......that works, I mean what is the ingredient or why it works?
Answers:
There are two ways to answer the question of how Viagra works. Here's the short answer: Viagra blocks an enzyme that prevents erections from happening.
The longer answer is: When sexual stimulation and arousal occur, they cause a chemical called cyclic GMP to be produced. Cyclic GMP creates erections by causing the arteries of the penis to expand and the veins to narrow. In other words, it creates a "traffic jam" of blood in the penis with blood entering faster than it leaves. That's what causes the penis to get hard.
Viagra stops an enzyme that attacks cyclic GMP, so more cyclic GMP can accumulate in the man's penis. With more cyclic GMP present it causes the normal expanding of the arteries and narrowing of the veins -- which produces an erection.
So in the presence of sexual stimulation, erection occurs -- as long as the stimulation is perceived by the man's body as sexual.
Viagra (Sildenafil) is used to treat male sexual function problems (impotence or erectile dysfunction) by blocking a certain enzyme (phosphodiesterase-PDE5) in the body. In combination with sexual stimulation, sildenafil works by helping the blood flow into the penis to achieve and maintain an erection.
This drug is taken by mouth as needed, at least 30 minutes, but no more than 4 hours, before sexual activity (1 hour before is the most effective). Do not take more often than once daily, and take as directed.
Because Viagra doesn't increase desire, it's not prescribed for men with desire disorders, such as a low sex drive. However, if the man has lost interest in sex because he has had problems with erections in the past, Viagra may help.
More about viagra usage can be found here - http://www.viagra.su/how-to-use-viagra.h...
and for side effects look here - http://www.viagra.su/viagra-side-effects...