Inclusion Criteria:  Age 18-65 years old willing to participate as research subject patient with erectile dysfunction and Diabetes Mellitus type 2 with IIEF-5 score <22 patient has sexual partner and sexually active patient is currently not consuming PDE-5 inhibitor drugs  Exclusion Criteria:  patient has psychopathology and/or mental retardation patient with Peyronie's disease patient with hypogonadism patient has malignancy in urological and non urological fields patient has history of cardiovascular disease with intermediate and high risk