What is the most important information I should know about levitra?
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Do not take vardenafil if you are taking any of the following medicines:
» a nitrate such as nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, Minitran, Deponit, Transderm-Nitro, others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), isosorbide mononitrate (Imdur, ISMO, Monoket), and others;
» a recreational drug such as amyl nitrate or nitrite (”poppers”); or
» an alpha blocker such as doxazosin (Cardura), guanadrel (Hylorel), prazosin (Minipress), terazosin (Hytrin), alfuzosin (Uroxatral), tamsulosin (Flomax), and others.
Taking vardenafil with any of these medications may cause very low blood pressure, possibly resulting in dizziness, fainting, stroke, or heart attack.
Contact your doctor or seek emergency medical attention for any erection that lasts longer than 4 hours. A sustained erection can damage the penis.
Refrain from further sexual activity and notify your doctor it you develop dizziness, nausea, or angina (pain, tightness, discomfort, numbness, or tingling in the chest, arms, neck, or jaw) during sexual activity.
Do not take vardenafil more than once a day. In some cases, use of vardenafil may be restricted to once every 72 hours (3 days). Follow your doctor’s instructions.