Viagra and many other PDE-5i inhibitors like Sildenfil, Cialis, Levitra, that men and women take for sexual dysfunction and pulmonary hypertension have been linked to not only sudden hearing loss which was reported some time ago but also to a gradual hearing loss. Over the years scientists began asking questions to users around the world as to whether they have noticed any hearing losses over months and years and the answer was a significantly significant yes. We urge those who are taking these medications to pay close attention to this particular side effect, as well as the other well-known problems, and report any complaints and observations to your doctor and to the FDA immediately.