Fildena 120 mg is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient sildenafil citrate, which is a phosphodiesterase type 5 (PDE5) inhibitor. Fildena 120 is a higher-strength version of Fildena, and it is designed for men who may not achieve the desired results with lower-strength doses. Fildena 120 mg is prescribed to help men with ED achieve and maintain an erection when sexually stimulated. It works by increasing blood flow to the penis, which is necessary for the erection to occur. The active ingredient, sildenafil citrate, inhibits the action of PDE5, an enzyme that constricts blood vessels in the penis. By blocking PDE5, Fildena 120 mg relaxes the blood vessels, allowing for improved blood flow and the ability to achieve an erection.