>Sildenafil (systemic)<


Commonly used medicines: Viagra
Description:  Sildenafil belongs to a group of medicines that delay the enzymes called phosphodiesterases from working too quickly. The penis is one of the areas where these enzymes work. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence).

By controlling the enzyme phosphodiesterase, sildenafil helps to maintain and erection that is produced when the penis is stroked. Without physical action to the penis, such as that occurring during sexual intercourse, sildenafill will not work to cause an erection.
 
By controlling the enzyme phosphodiesterase, sildenafil helps to maintain and erection that is produced when the penis is stroked. Without physical action to the penis, such as that occurring during sexual intercourse, sildenafill will not work to cause an erection.

Precautions:
Sildenafil has not been studied with other medicines used for treatment of erectile dysfunction. Presently, using them together is not recommended. Use Sildenafil exactly as directed by your doctor. Do not use more of it and do not use it more often than your doctor ordered. If too much is used, the chance of side effects is increased. If you experience a prolonged or painful erection for 4 hours or more, contact your doctor immediately. This condition may require prompt medical attention to prevent tissue damage of the penis and possible permanent impotence.