cialis 60 belongs to a group of medicaments known as PDE5 inhibitors. In order to understand exactly how the medication works, it is necessary to understand the physiological mechanism of erection.
levitra 60 contains an active ingredient, Sildenafil, an FDA-approved medication used to treat erectile dysfunction problems in men. This Sildenafil 100 mg is a well-known medication, which is extensively used to deal with impotence, which is a typical sexual complaint in men.