The main ingredient of Fildena 120 is Sildenafil citrate, which inhibits the discharge of PDE5 enzymes in the body. PDE5 inhibits the action of certain hormones in the body, including nitric oxide, and increases the course of the blood. Fildena 100 contains lactose monohydrate. This combination of ingredients can be effective for the treatment of erectile dysfunction in both men and women.