Hi, my husband is having trouble getting and maintaining an erection. He is 52 and has had a mild heart attack 7 yrs ago, he is on metoprol, lisinopril, zetia, and low dose aspirin. Is there anything that he can do to help this issue without going to the doctor or taking extra medications. He was also told over 20 yrs ago that he had an enlarged prostate. Would that affect the blood flow to the penis? Thanks for your help.