Cialis sans ordonnance problems (erectile dysfunction)?Erection problems or erectile dysfunction is caused by both psychological and physical factors. It is thought that in 75% of cases there is a physical factor involved.Psychological factors cialis sans ordonnance contribute to or cause erection problems or erectile dysfunction include; stress and.

Cialis sans ordonnance to cialis sans ordonnance or maintain cialis sans ordonnance penile erection). It is in a class of drugs called phosphodiesterase inhibitors that also includes sildenafil (Viagra) and vardenafil (Levitra).Erection of the penis is caused by the filling of the penis cialis sans ordonnance blood. Filling occurs because the blood vessels that bring blood to the penis increase cialis sans ordonnance size and deliver more blood to the penis, and, at the same time, the blood vessels that cialis sans ordonnance blood away from the penis decrease in size and remove less blood from the penis.Sexual stimulation that leads to an erection causes the production and release of nitric oxide in the penis. The nitric oxide causes an enzyme, guanylate cyclase, to produce cyclic guanosine monophosphate (cGMP). It is the cGMP that is primarily responsible for increasing and decreasing the size of the blood vessels carrying blood to cialis sans ordonnance from the penis, respectively, and causing the erection. When the cGMP is destroyed by another enzyme, phosphodiesterase-5, the blood vessels return to their normal size, blood leaves the penis, and.

Cialis sans ordonnance taking Cialis?Do not take Cialis if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin.