A drug called Fildena 100mg is used to help erectile dysfunction (ED) in men. Sildenafil citrate, which is the main ingredient, is a phosphodiesterase type 5 (PDE5) inhibitor, which is a type of drug. Fildena 100mg works by sending more blood to the penis, which helps men get and keep an erection when they are sexually excited. A healthcare source should be in charge of and write a prescription for Fildena before it is taken. Fildena 150mg is alternatives to it.