The effectiveness of Fildena, specifically its active ingredient sildenafil citrate, lies in its ability to target the physiological processes that play a role in erectile dysfunction (ED). Here's a closer look at the science behind Fildena's effectiveness: Inhibition of PDE5: Fildena belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. PDE5 is an enzyme that...