Fildena 200 works by causing blood vessels to widen, which relaxes the muscles, especially in the pelvic area, and makes the erection harder. Additionally, the hardness of the erection is easily felt as the blood flows or inrushes. (The Process of Vasodilation) Fildena Double 200 mg, or simply Fildena, is a regular dosage that controls the inhibition of PDE-5 hormones, which are inhibitory hormones also known as vasodilating medications. This causes the body to release cGMP hormones. It significantly raises the volume and flow of blood that travels to the arteries and veins in the penis. It lowers the risk of heart disease by regulating and controlling blood flow in cases of hypertension.