Blood Pressure Medication
Blood pressure medications decrease blood flow to the penis, which can exacerbate the effects of blood vessels that have already been damaged by high blood pressure. Several studies indicate that blood pressure medications can cause erectile dysfunction, but some blood pressure medications are meds bigger offenders than others. Water pills like hydrocholorothiazide are perhaps the worst culprit, according to several studies, followed by beta blockers like propranolol and calcium channel blockers like nifedipine. Beta blockers both decrease blood flow and also lower the heart rate, making blood flow to the penis even more difficult. The science doesn't explain why water pills are worse, but studies show that sexual function improves in patients taking water pills after they lose weight.