At present the two preparations are more often used for erectile dysfunction (or impotence) treatment – Viagra and Cialis. Viagra appeared at the Russian medicine market in 1998, Cialis appeared five years later, in 2003. Both have the same action mechanism which is in phosphodiesterase-5 (PDE-5) enzyme blocking, while this enzyme is responsible for cyclic guanosine monophosphate splitting. This enzyme is responsible for the vascular components which play an important role in the appearance of the penis erection. The level of cyclic guanosine monophosphate is below normal among men suffering from erectile dysfunction, that’s why it’s not enough for providing sound erection.
So, in order to heighten the level of cyclic guanosine monophosphate in the organism a simple enzyme blocking method able to split cycling guanosine monophosphate was used.
As for the side effects of Viagra and Cialis, they are quite similar; in both cases after the preparation taking vertigo, headache, diarrhea, nausea, stuffiness in nose, and the sensation of blood inflow to the head can be felt. Besides, when taking Cialis, a pain in the small of the back, stomachache and a pain in joints can appear. As a rule all the side effects progress in the light or moderate form. You should also remember that for Cialis the possibility and the force of side effects can be decreased during its further taking.
As far as Viagra has existed at the market, there stored enough information which doesn’t speak well for this preparation. The fact that Cialis can be taken together with fat food and alcohol in small dozes says much for it. So, we can state with certainty that this time Cialis is better than Viagra, but you should keep in mind that taking some medical preparation isn’t a panacea for impotence.
