Fildena 100mg contains generic Sildenafil Citrate, which is an inhibitor of the enzyme PDE-5. Thus, Fildena inhibits a PDE-5 enzyme that helps stop cGMP starvation due to the PDE-5 enzyme. Once a man is successfully s*xually aroused and his body releases nitric oxide, Fildena 100 will help relax the constricted blood vessels around the genitals. This causes adequate blood flow to the erectile organ to achieve and maintain a rigid erection to achieve satisfaction and pleasure in a full lovemaking session without experiencing erectile disappointment.