Erectile dysfunction is horrible. End of story. Even if you have never suffered from it, even if you are a woman, you are certainly aware of the horrific effect it has on all men, without exceptions. While it is true that over 30 per cent of men around 40 already have issues with achieving and

1. The history of Viagra In the early 1980s, medical science realized it was possible to artificially induce an erection by means of an injection. The breakthrough came with the development of a muscle relaxant called Phentolamine. The problem, however, was that the erection resulted from the injection no matter what the man was doing.

When a drug goes through the research and development process, the manufacturer is investing a considerable amount of capital in proving the drug to be both effective and safe. To give companies an incentive to go through this long and financially risky process (not every drug under development is effective enough to sell to the

Erectile dysfunction (impotence) – a serious sexual disease in men. Erectile dysfunction or impotence, it is more commonly known – is the inability to achieve or maintain an erection before or during sexual intercourse. Impotence may be due, as with the physical and psychological factors. In most cases, impotence is associated with high levels of

At present, for the prevention and treatment of erectile dysfunction are most often used such drugs as Viagra (active ingredient – sildenafil citrate) and Cialis (active ingredient – Tadalafil). First in the world pharmaceutical market appeared Viagra 1998, Cialis on sale in 2003. The mechanism of action of both drugs is the same and by