Fildena 120 mg is a medication commonly used to treat erectile dysfunction (ED) in men. It contains Sildenafil citrate as its active ingredient, the same compound found in Viagra. Sildenafil is a PDE5 inhibitor, which works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually stimulated. Fildena 120 mg is considered a high-dose form of Sildenafil and is typically prescribed for individuals who have not responded well to lower doses.