Fildena 120mg uses the powerful dose of sildenafil citrate in a dose of 120 mg. It is an FDA approved medication known for its effectiveness in naturally treating underlying symptoms. Sildenafil citrate is a class 5 PDE inhibitor that works by dilating blood vessels and clearing clogged arteries. It makes the penis harder and stays erect for longer by providing it with effective blood. So, this allows you to enjoy it to the fullest without any worries.