A disturbance in the filling of the cavernous or cavernous bodies occurs due to alcohol abuse, smoking, stress, as well as psychological problems, and we wrote about it in a recent article http://medicallightassociation.com/viagra-vs-cialis-vs-levitra-science-backed-tips-on-how-to-choose.html. In addition, the causes of erectile dysfunction are sedative medications and include diuretics, tranquilizers and hypotensive drugs.