A PDE-5 inhibitor medication called Fildena is used to treat erectile dysfunction, or ED. Impotence, also known as ED, is the inability to achieve an erection during sexual activity. Some guys have the ability to get an erection, but it's quite mild. Fildena works by obstructing the inhibitor of PDE-5. This particular enzyme facilitates the degradation of cGMP. Adjusting the blood drift through the Penis's streets is the primary function of cGMP. Take this at least 30 minutes prior to sexual activity if you're using it just for that purpose.