How Does Cialis Work? Like other PDE5 inhibitors, Cialis blocks an enzyme known as phosphodiesterase type 5 (PDE5) in the spongy part of the privates.

Although Cialis and Viagra both make it easier to get and maintain an erection, there are a few key differences between these ...

But does it really work? Here's what professionals have to say. ... (Cialis) “are better options for helping [males] get good erections than supplements such as Virectin,” Shteynshlyuger says.