Viagra was the first recognised prescription medication to be successful in the treatment worldwide of male erectile dysfunction which is more commonly known as impotence. Viagra was approved for use in 1998 and was a breakthrough in the treatment of this disorder in allowing men to enjoy normal sexual relations, even though they were suffering from impotence.  Over 20 million men have benefited from Viagra even though it has only been in production for just a few years, which illustrates the extent of penile dysfunction. Genuine Viagra is easily recognised by its blue colour and the diamond shape, which is the trademark of the Viagra manufacturer, Pfizer.

Viagra contains Sildenafil Citrate the ingredient which is activated when a man is sexually stimulated and then an erection occurs.  With Viagra a man is able to control the time when he wants to have an erection, as Viagra is effective in a period from as short as 14 minutes and can last for as long as 4 hours.

Viagra works by causing the smooth muscle in the blood vessel to relax and increase the blood flow to the penis. When a man is sexually excited, the penis rapidly fills with blood, which expands into an erection. For most men obtaining and maintaining an erection is not difficult however, there are many that have problems. Following sex, the veins maintaining the erection relax and the blood flows back and the penis relaxes. For men with erectile dysfunction this is not possible and Viagra can help in these cases.

There are many reasons for impotence some physical and some mental but what ever the reason it has been found that in over 80% of men, Viagra will help.

When a man is suffering from erectile dysfunction it is important that they talk to their Doctor who will advise whether Viagra will help. Viagra has been successful in most men tested however; there have been handfuls that have experienced side effects. If you have heart problems you may also have difficulty with penile dysfunction medications. Studies show that erectile dysfunction is often caused by other health problems. The most common causes are high blood pressure, high cholesterol, and diabetes. These conditions reduce blood flow to the penis. Penile dysfunction can also be associated with smoking, drinking, or stress, in most cases, Viagra can help.