Fildena 150 mg tablet is a brand name for a medication called sildenafil citrate, which is primarily used to treat erectile dysfunction in men. It belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. The active ingredient in Fildena 100mg pills , sildenafil citrate, helps relax the smooth muscles in the walls of blood vessels, thereby increasing blood flow to certain areas of the body, including the penis, which helps in achieving and maintaining an erection.