There have always been some potent symptoms of impotency or erectile dysfunction, the major one being the inability to attain and maintain proper erection and hardness of your penis. Erectile dysfunction is marked by an inadequate erection at the time of sexual intercourse. The other symptoms to recognize erectile dysfunction are improper erection, premature ejaculation, loss of sexual desire and lesser duration of erection at the time of sexual intercourse. The symptoms aftermath of erectile dysfunction are dejection, depression, loss of self esteem, mental instability, insomnia, distress and feeling fatigue.

It is not a matter to worry a lot if anyone is suffering from erectile dysfunction; however people tend to lose their sleep worrying about their inability to attain proper erection. The treatment options have improved significantly with the arrival of newer methods and drugs that are really effective in curing your erectile disabilities. Although there are a lot of options to get rid of ED, you should always go for it in a proper way and under efficient supervision. Visiting a good doctor is always advised to treat ED. One thing that should be noted is that with self treatment and medicines, or any other method without any doctor's advice can only worsen your condition. The deciding factor in the treatment of erectile dysfunction should be based on the cause of your ED. The major factors contributing to erectile dysfunction are medicines, medical conditions, stress, lifestyle, weak blood flow, weight gain and diabetes. The doctors after inspecting you determine the line of your erectile dysfunction and whether sexual capability can be reversed without any consumption of medicines or not. If not the doctors start their treatment prescribing the medicines like Viagra, Cialis or Levitra.

Viagra as the most effective treatment:

Viagra is not only to help people get rid of erectile dysfunction; it can also effectively treat pulmonary arterial hypertension. This drug was developed and endorsed by the famous pharmaceutical company known as Pfizer. The enzymes like phosphodiesterase5 in our body are excited by Viagra that contains the famous drug Sildenafil Citrate. These excited enzymes now are brought to relax the blood vessels in penis in turn. Being sexually excited slowly causes the blood to flow through the veins running through corpora cavernosa in greater volume causing an erection. It should be made clear that Viagra does not enforce erection to anyone and your sex organ will not erect without excitation.

Another medicine that is placed in the same league to that of Viagra is Cialis, the recommended dosage being 10 mg to 20 mg. Levitra is used to cure ED with the dosage of 5 mg to 20 mg. among all these medicines that are being prescribed by the doctors and used by the needful, Viagra is the most preferred and popular one because of its ability to help millions to lead a satisfying sexual life without any difficulty.

Mechanism of action: Viagra has been the best medicine so far to treat impotency. Since PDE5 is specific to penis only, Viagra is thus a specified drug to cause erection in the penis. Sildenafil citrate restrains the cGMP specific PDE5, an important enzyme regulating the blood flow to the penis. It then releases nitric oxide (NO) in the penis (corpora cavernosa). The NO now binds along with the protein guanylate cyclase, thus increasing the levels of cyclic cGMP. Finally there is relaxation in the muscle and an increased blood flow which causes an erection during sexual intercourse.