Fildena 50 mg is a medication commonly used to treat erectile dysfunction (ED) in men. It contains the active ingredient Sildenafil Citrate, which is also found in well-known medications like Viagra. Sildenafil is a type of phosphodiesterase type 5 (PDE5) inhibitor, which helps increase blood flow to the penis, making it easier to achieve and maintain an erection during sexual stimulation.