Hi thanks for contacting HCM... You are having erectile dysfunction and given vardenifil which is PDE 5 inhibitor drug and you respond well to that.... Now for maximum benefit and to avoid usage of drug identify cause for that... Smoking , alcohol avoided if having habit as they can lead this condition... Rule out diabetics by doing PP2BS estimation sugar.... Rule out hypertension.... If you have prostate problem or any cardiac condition then it might be cause .... Avoid stress, depression etc... If you are obese loose weight.... Sex therapy session can be helpful... Be relax during sex and do it in comfortable position... Do more fore play .... Regular exercise.... You consult psychiatrist for detail examination and investigation... Take care ....