Cenforce 100 is an erectile dysfunction drug that works well. Cenforce is manufactured by Centurion Laboratories in a variety of strengths and formulations. Cenforce includes sildenafil citrate, which is a substance that is comparable to Viagra. Cenforce 100 contains sildenafil, a PDE5 inhibitor. Cenforce 100 is widely prescribed by doctors to treat male erectile dysfunction (impotence). Phosphodiesterase type 5 (PDE5) is a penile enzyme that is in charge of erections. Cenforce 200 is a Phosphodiesterase 5 (PDE5) inhibitor, which means it inhibits the enzymes in the penis responsible for a powerful erection.