Today Cialis medicine is the most authoritative and popular in the world drug that solves the problem of impotence, increases erection and helps to cause a bright male orgasm. Of course, there are other drugs of similar purpose, but in many respects it is Cialis remains the best of its kind. The reasons are obvious and should be considered in more detail. When the European Union allowed the drug Tadalafil to be used clinically, the treatment of so-called erectile dysfunction, or impotence, became more effective. The new drug based on Tadalafil was commercially called Cialis. The product of the joint development of two American companies: pharmaceutical and specialized in the development of biotechnology, similar to Viagra, but with a faster effect, and the ability to 8-10 times longer to maintain its impact.