Viagra (cildenafil citrate) and erection

Feature of Viagra is that it restores ability of the man to erection, and simply causes increase of erection for 4 hours. As to the mechanism of Viagra’s action on erection it increases amount of blood acting in a sexual organ that helps a man to get a natural erection. Viagra works only when the man has natural sexual excitement and when the sexual act is finished, the sexual organ naturally comes back in weak condition. Viagra works only on natural mechanisms of erection. And this is it’s undisputable know-how and a secret of huge popularity of viagra.
Viagra was tested by more than 3000 men in the age of from 19 till 87 in researches of erectile disfunction, spent worldwide. Duration of infringements of erection at these patients has averaged 5 years (from 6 months till 26 years), and frustration of erection was organic, psychogenic and mixed organic and psychogenic. Results of researches of Viagra show, that Viagra is effective for restoration of erectile function and improvement of erection parameters at plenty of patients, including those sick with diabetes, with damage of a spinal cord, other accompanying clinical conditions, and also at the patients taking a lot of medicines at the same time. Therefore Viagra is the answer to the question how to increase erection.