To understand the relations between blood pressure drugs and erectile dysfunction, it is instructive to known the basic cause of the erectile dysfunction. And that is low blood flow towards the sexual organ. The soft tissues of the penis need to be filled with blood to have the strongest erection.
The blood pressure drugs lower the blood flow towards the penis, which makes them culprit. Any issue that lowers the blood flow in the penis is the cause of the erectile dysfunction in men. The basic function of the medicines like Viagra 150mg is to increase the blood flow and give an erection.