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Sexual life is significant for all people, regardless of the age. But, a few men have great problems with their erection. It bothers them greatly and diminishes their self-esteem. And anyone, certainly, wishes to be at his best in sexual affairs. In the most important situations impotence may lead to the comedown and even break of relations.

Viagra (Sildenafil), Cialis (Tadalafil) and Levitra (Vardenafil) are three medicines for impotence which are nearly identical from the point of view of pharmaceutics. At the same time manufacturers of every medicine try to convince the audience that it's better than others. The luck of ad drives rather than health indicators are probable to decide the destiny of every drug preparation and decide the most prevailing of them. Various web-stores would help one buy Viagra online. One may also buy Cialis online there.

All these drugs are the products of the set of medicines called phosphodiesterase type 5 inhibitors. Erection is generally enfeebled by PDE-5, the ferment that holds back the expansion of vessels of the penis. The structure and characteristics of Viagra and Levitra are quite identical. The organization of Cialis is a little different.

But actually the principle diversity between the drugs is that one of them (Levitra) is rapidly absorbed, and another - Cialis - is heavily got out of the body. That's the effect of all FDE-5 inhibitors is actually similar but different in term and continuance of action.

All 3 medicines are effective in approximately 80 percent of cases.

The smallest efficient dosage is of Levitra: it's 5-10 times smaller than those of the competitors. This slightly diminishes the intensity of side-effects, but with disorders of cardiovascular system and after the stroke drug preparation is still contraindicated.

And some more data on under-effects: all three medicaments, except the “required” FDE-5 enzyme, as well obstruct the others. For example, color sense for which FDE-6 ferment is answerable can be influenced by Viagra and Levitra. The activity of FDE-11 in the heart, cerebrum, or thymus, is retrained by Cialis. But nobody has yet found out what precise unsuitable effects it can bring about.

One more question is the interaction of these medicines with alcohol drinks and nourishment. It is known that taken on an empty stomach Viagra produces a much prompter effect than with a meal. However, the impact still befalls but slower. Cialis does not interact with alcohol as its promotional brochures read, in contrast to the competitors. In point of fact, there is info that Levitra is also safe in conjunction with alcohol, only this “trump card” hasn't yet been brought by the marketers urging all to buy Levitra. Perhaps because the “trump” is equivocal: alcohol misuse is one of the frequent reasons of impotence.