Fildena Double 200 Mg is in a Class of medicines called phosphodiesterase (PDE5) inhibitors This is the highest-powered sildenafil available. Hence, take this with proper prescription only. Fildena Professional 100 Mg tablet helps in regulating blood flow to the penis. Fildena double 200 Mg Tablet works through cyclically increasing cGMP levels. By increasing the level of the component, the drug helps relax the corpus cavernosum smooth muscles and hemolysis.