Fildena 100 mg is a medication used to treat erectile dysfunction (ED) in men. It is a type of phosphodiesterase-5 (PDE5) inhibitor drug, which works by increasing blood flow to the penis, helping to achieve and maintain an erection. However, it is important to note that Fildena or any other ED medication should only be used under the supervision of a doctor, and it is not a cure for ED. It is important to follow the instructions and dosage guidelines provided by your doctor.