Cenforce 100mg is a prescription-only medicine used to treat male erectile dysfunction (ED) or impotence. The active ingredient in the medication is sildenafil citrate. It works to cure impotence by inhibiting Phosphodiesterase type-5 (PDE5), a substance that occurs naturally in the penile area. Cenforce 100mg (sildenafil citrate), popularly known as the Blue pill, will cure men’s sexual impotence.