Cenforce FM 100 that works for erectile dysfunction. It is an improved drug that contains sildenafil. It is an inhibitory activity of phosphodiesterase receptors that occurs upon increased blood flow to the p*nis during physical proximity. Cenforce D is potent and just one pill is also helpful in getting a firm erection. The drug begins its action after 30-40 minutes of taking and lasts about 4-5 hours.