Cenforce 100mg is used for the treatment of men with erectile dysfunction, which is the inability to achieve or maintain a penile erection sufficient for satisfactory sexual performance. Cenforce is used to treat erectile dysfunction (ED). ED is the inability to get or maintain an erection. Cenforce 100mg (Sildenafil 100mg) belongs to a group of medicines called phosphodiesterase type 5 inhibitors. It works by helping to relax the blood vessels in your penis, allowing blood to flow into your penis when you get sexually excited.