Hearing Loss Now Added to Possible Side-effects of Viagra: "How much can one pay for a satisfactory sex life? Heart attack, vision loss and now hearing loss too. Yes that is what the Viagra class of drugs can do to you, the United States Food and Drug Administration (FDA) is waning. Since 1996, the FDA has received 29 reports of people on the prescriptions suffering sudden hearing loss. Warnings will now be added to Viagra, Cialis, Levitra and Revatio, which is a drug for pulmonary hypertension, which contains the same ingredient as Viagra. "