Do not use Levitra if:

• you are allergic to any ingredient in Levitra;
• you are taking or using nitroglycerin (eg, tablet, patch, ointment), nitrates (eg, isosorbide), or certain antiarrhythmics (eg, amiodarone, quinidine);
• you have had a heart attack, stroke, or life-threatening irregular heartbeat within the past 6 months;
• you have certain eye problems (eg, retina diseases such as retinitis pigmentosa), uncontrolled chest pain, uncontrolled high blood pressure, low blood pressure, irregular heartbeat (eg, congenital QT prolongation), severe heart failure, severe liver problems, or end-stage kidney disease that requires dialysis.

Stop using vardenafil and call your doctor at once if you have any of these serious side effects:

• sudden vision loss;
• ringing in your ears, or sudden hearing loss;
• chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;
• irregular heartbeat;
• swelling in your hands, ankles, or feet;
• shortness of breath;
• vision changes;
• feeling light-headed, fainting; or
• penis erection that is painful or lasts 4 hours or longer.

• warmth or redness in your face, neck, or chest;
• stuffy nose;
• headache;
• upset stomach; or
• back pain.

Levitra is available with a prescription under the brand name Levitra. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new for you.