Fildena 150mg contains 150 mg of Sildenafil Citrate. This ingredient helps in developing the circulatory system in the veins and improving the firmness of the erection. Sildenafil citrate works by relaxing the muscles, relaxing the veins and increasing nitric oxide. Sildenafil citrate can also affect the heart, liver and lungs. It should be taken as directed by your doctor. During erection,...