The purple pill, Fildena 100 mg, is an excellent treatment for erectile dysfunction. Fildena sildenafil citrate active component helps men keep an erection going strong. Vascular smooth muscle is relaxed, allowing the correct amount of blood to flow to the male genital area. This is how the tablet works to keep blood arteries from narrowing and improve blood flow. By increasing blood flow, it becomes easier to achieve and keep an erection.