Cenforce 100 mg is a medicine used to treat impotence in men. It works by increasing blood flow to the penile region of the body. This helps men get and keep an erection. It is one of a class of drugs called phosphodiesterase type 5 (PDE 5) inhibitors. Researchers accidentally discovered the ability of PDE 5 inhibitors to improve erectile dysfunction in men while examining their potential use for hypertension and angina.