One could easily wonder who are the people who suffer form this disease and it wouldn't be surprising that every fifth person would either be suffering from it, or would be a potential patient who would be affected by the disease in the coming years.

Impotency is this wide spread that is the reason that today the top medical companies have started taking this disease seriously. The effect is the availability of 3 FDA approved drugs, which are Viagra, Levitra and Cialis and many more Generic versions.

Erectile Dysfunction happens when there isn't sufficient blood flow in the penis and hence the penis remains flaccid. To cure this problem, all the medicines i.e. Viagra, Levitra and Cialis work by increasing the blood flow into the penis so that when a man is sexually stimulated, he can get an erection. This happens as the medication helps the muscle of the penis relax, allowing more blood to flow.

Cialis is the most recent medicine to join this list and also one of the most successful. The reasons are simple. A. The time needed for Cialis to take effect is 30 minutes; where as the effect time for the other medicines are at least 45 m to an hour. B. While Viagra's effect only last 4 hours, Levitra does better and the effect of the medicine can last for 5 hours. Its only Cialis that the effect can last up to 36 hours. The benefit of the medicine lasting for nearly 2 whole days has also earned itself the nickname 'the Weekend Pill'.

C. And one of the most comforting points regarding Cialis in comparison to the other medicines with regard to the procedure of intake of the pills. Its only Cialis that can be taken even after a full meal, while the other have to be taken on an empty stomach for the effect to take place as fast as possible.

Cialis is easily available on the internet. And it's the fact that most of these medicines are available on the net that today Net Pharmacy has mushroomed that are providing great benefits for purchase of these medicines through them. Another important factor regarding purchasing of the medicines through the net pharmacies is that it's a very private affair, which goes very well with the medicine and what it treats.

Cialis share in the market has been increasing over the years and today many of the patients who were taking Viagra or Levitra have switched over to Cialis.