Erectile dysfunction (ED), which is generally called impotence, is the repeated inability of a man to get or maintain an erection of penis sufficiently rigid for sexual intercourse, ejaculation, or both. Today, ED has become a serious sexual health problem in men as it affects a person psychologically. Due to the personal nature of the disease, it is difficult to estimate how many men are affected by it. A person suffering from Erectile dysfunction rarely come forward to talk it openly with health personnel, but nowadays, it is discussed openly and more men are coming forward to treat it.

The most common cause of Erectile dysfunction (ED) is damage to the tissues, nerves, arteries, muscles or fibrous tissue. Conditions such as diabetes, kidney disease, chronic alcoholism, multiple sclerosis and cardiovascular disease account for around 70% of cases of ED. Erectile dysfunction is also a side effect of some common medications, including blood pressure drugs, antihistamiines, antidepressants and tranquilizers. According to health experts, psychological factors such as stress, anxiety, guilt, depression, low self-esteem, and fear of sexual failure cause up to 20% of cases. Smoking has also been linked to ED.

Being older is primarily associated with impotence in most men. Nevertheless, impotence is not inevitable with age. Clinical studies suggest that men of any age can be affected by this problem at some point of their sexual life. ED is treatable at any age, and awareness of this fact has been growing. More men have been seeking help and returning to normal sexual activity because of improved, successful treatments for ED.
Various options for the treatment of ED are available today. Psychotherapy is prescribed by doctors for patients who are likely to benefit, but alternative treatment includes drugs, vacuum devices, and surgery. There has been a surge of interest among men on the wonder drug Sildenafil citrate or Viagra, which was approved by the U.S. Food and Drug Administration in 1998.

Viagra belongs to a class of drugs called phosphodiesterase inhibitors, and it works by increasing blood flow to the penis. Once you take it, Viagra can work in as quickly as 30 minutes. Viagra works for 4 hours. As with all erectile dysfunction medications, Viagra should only be used under a doctor's supervision.

The recommended dose for Viagra is 50 mg, and the physician may adjust this dose to 100 mg or 25 mg, depending on the patient. The most common side effects of Viagra are headache, facial flushing, and upset stomach. Less commonly, bluish vision, blurred vision, or sensitivity to light may briefly occur.

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