What Is Cialis 20 Mg Used For? Erectile dysfunction is a condition in which it’s hard to get or keep a firm erection long enough to have sex. Though prevalence estimates vary, health experts agree that it is a common problem. It happens once in a while. Most men who
Viagra USA contains sildenafil which is helpful to treat the erectile problem. Sildenafil belongs to the class of medicines called PDE5 inhibitors which are also known as phosphodiesterase type 5.
