Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. This makes hearing loss one of the rarest potential side effects of Levitra. In a report from , researchers describe a patient who experienced sudden loss of hearing after using vardenafil to treat erectile dysfunction. Call your doctor for medical advice about side effects. Use the medicine exactly as directed. The information contained herein is not a substitute for and should never be relied upon for professional medical advice. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil.Common side effects of Levitra include facial flushing (reddening), headaches, stomach upset, diarrhea, flu-like symptoms, and nausea. Serious side effects of Levitra include . What Are Side Effects of Levitra? Levitra may cause serious side effects including: hives, difficulty breathing, swelling of your face, lips, tongue, or throat, chest . Common ones include: Flushing of the skin. Headache. Upset stomach. Visual changes, such as blue tinge to vision, sensitivity to light or blurred sight. Stuffy or .