Viagra in the form of sildenafil citrate is used mainly to cure the problem of erectile dysfunction. It can treat all type of patients irrespective of his age and body type. Before taking viagra always consult your doctor that the medicine you are taking is suitable for you or not. Sildenafil citrate contains sildenafil citrates and it is taken orally. The Indian and FDA have approved this medicine for the export. The penis becomes rigid and stiff when viagra is taken. The blood pressure is increased in the penis and makes it relax and firm. Sildenafil citrate is specially designed for men to combat their impotence.

It works only when a person is sexually aroused and sexually encouraged and excited. It increases the blood flow of the penis by stimulating sexual organs and smooth muscles are relaxed by viagra. This is done by series of chemical processes and the particular enzyme is blocked.

Viagra can be said as miracle in medical science. The main reason for the impotence is nerves cells are damaged and inactive, arteries blocked in that area, and also the fibrous tissue. Some more reasons are diabetes, disorders of kidney and the persons who are smoking.