The medication Cenforce 100, which is exclusively available by prescription, is used to treat impotence or erectile dysfunction in men. Sildenafil citrate is the medication's active component. By blocking Phosphodiesterase type-5 (PDE5), a chemical that naturally occurs in the penile region, it helps treat impotence. The "Blue pill," also known as Cenforce 100mg (sildenafil citrate), will treat male impotence. For the treatment of male impotence or erectile dysfunction (ED), Cenforce 100 is a prescription-only medication. The substance that makes up the medications' active ingredient is sildenafil citrate.