Increases blood flow to the penis to help achieve and maintain an erection. FDA-approved and therefore considered 100% safe. Action is not reduced by fatty foods, so can be eaten with or without a meal. Helps treat ED in men with health problems, such as diabetes, high cholesterol or high blood pressure.

Precautions. Before using this drug inform your pharmacist or doctor of your medical history, including allergies and medical conditions. If you have any of these other conditions, you may need a Levitra dose adjustment or special tests: heart disease or heart rhythm problems, recent history (in the past 6 months) of a heart attack, angina (chest pain), or congestive heart failure, recent history of stroke or blood clots, personal or family history of "Long QT syndrome", high or low blood pressure, liver or kidney diseases (or if you are on dialysis), blood cell disorder such as sickle cell anemia, multiple myeloma or leukemia, bleeding disorder such as hemophilia, stomach ulcer, retinitis pigmentosa (an inherited condition of the eye), physical deformity of the penis (such as Peyronie's disease), if you have been told you should not have sexual intercourse for health reasons. Although Levitra is not intended to be used by women, this medication is not expected to be harmful to an unborn baby. However, it is not known if this medication passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby. You may need a lower dose of this medication if you are older than 65. Follow your doctor's instructions.Drug interactions.Do not take Levitra if you are taking: Alpha blockers such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), tamsulosin (Flomax), and terazosin (Hytrin)Nitrates such as isosorbide dinitrate (Isordril, Sorbitrate), isosorbide mononitrate (Imdur, ISMO), and nitroglycerin (Nitro-BID, Nitro-Dur, Nitroquick, Nitrostat, others).Nitrates come as tablets, sublingual (under the tongue) tablets, sprays, patches, pastes, and ointments. Ask your doctor if you are not sure if any of your medications contain nitrates or you use street drugs containing nitrates such as amyl nitrate and butyl nitrate ('poppers') while taking vardenafil.Tell your doctor or pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking. Be sure to mention any of the following:Amiodarone (Cordarone)Antifungals such as fluconazole (Diflucan), itraconazole (Sporanox), and ketoconazole (Nizoral)Clarithromycin (Biaxin)Cyclosporine (Neoral, Sandimmune)Danazol (Danocrine)Delaviradine (Rescriptor)Diltiazem (Cardizem, Dilacor, Tiazac)Disopyramide (Norpace)Erythromycin (E.E.S. , E-Mycin, Erythrocin)Fluoxetine (Prozac, Sarafem)Fluvoxamine (Luvox)HIV protease inhibitors such as indinavir (Crixivan) and ritonavir (Norvir)Isoniazid (INH, Nydrazid)Medications for high blood pressure or irregular heartbeatMetronidazole (Flagyl)Other medications or treatments for erectile dysfunctionNefazodone (Serzone)Paroxetine (Paxil)Procainamide (Procanbid, Pronestyl)Quinidine (Quinidex)Sotalol (Betapace)Troleandomycin (TAO)Verapamil (Calan, Covera, Isoptin, Verelan)Zafirlukast (Accolate).Your doctor may need to change the doses of your medications or monitor you carefully for side effects.

Stop using Levitra and get emergency medical help if you experience a sudden loss of vision. Get emergency medical help if you have any of these signs of an allergic reaction: hives, difficulty breathing, swelling of the face, lips, tongue or throat. Call your doctor right away if you experience any of the following serious side effects of Levitra during sexual activity: dizziness or nausea, pain, numbness, or tingling in the chest, arms, neck, or jaw. Equally call your doctor immediately and stop using this medication if you experience any of these serious side effects: sudden loss of vision, ringing in your ears or sudden loss of hearing, chest pain or heavy feeling or pain spreading to the arm or shoulder, nausea, sweating, generally feeling ill, irregular heartbeat, swelling of the hands, ankles or feet, shortness of breath, changes in vision, feeling light-headed or faint, erection that is painful or lasts 4 hours or longer, seizures (convulsions). Less serious side effects may include: warmth or redness in the face, neck or chest, stuffy nose, headache, memory problems, upset stomach, back pain. This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.