General information about Viagra

Before taking Viagra, I decided to find some information about it. So, here is some general information about Viagra. Viagra is a preparation used for the treatment of the Erectile Dysfunction. It has an effect upon the natural mechanism of the erection beginnings. It helps a man to provoke erection. Usually it is used by men suffering the Erectile Dysfunction of different origin (a vascular or nervous Erectile Dysfunction). The mechanism of Viagra action consists in the increase of blood quantity coming in penis that helps a man to provoke a natural erection. Viagra influences only natural mechanism of erection appearance. Viagra has a very high effectiveness that depends on the type of the Erectile Dysfunction. All you have to do is to take the pill an hour before the sexual activity. After 30-60 minutes it began to work. There is a lot of information in the Internet about Viagra. You may find there either answers to such questions:

What is it Viagra? What is the mechanism of its functioning? What is the effectiveness of Viagra? Does Viagra raise a sexual desire? Who can take it? How can you define a sexual norm?