How Vilitra 60mg works Vilitra 60 mg Vilitra is a drug that inhibits PDE-5, that is, it works by limiting the function of this enzyme. This enzyme is a cause of impotence or erectile dysfunction because it destroys cyclic guanosine monophosphate (cGMP) molecules that help with erection.  cGMP relaxes/dilates the blood vessels present in the corpus cavernosum and draws more blood into them,...