comparison of viagra levitra and cialis

What is the most important information I should know about Levitra?
• Do not take Levitra 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 comparison of viagra levitra and cialis.
• Taking Levitra with any of these medications may cause very low bloodpressure, possibly resulting in dizziness, fainting, stroke, or heart attack
• Contact your doctor or seek emergency medical attention for any erectionthat lasts longer than 4 hours comparison of viagra levitra and cialis. A sustained erection can damage the penis comparison of viagra levitra and cialis.
• Refrain from further sexual activity and notify your doctor it you developdizziness, nausea, or angina (pain, tightness, discomfort, numbness, or tinglingin the chest, arms, neck, or jaw) during sexual activity comparison of viagra levitra and cialis.
• Do not take Levitra more than once a day comparison of viagra levitra and cialis. In some cases, use of Levitramay be restricted to once every 72 hours (3 days) comparison of viagra levitra and cialis. Follow your doctor's instructions comparison of viagra levitra and cialis.

What is Levitra?
• Levitra relaxes muscles within the penis comparison of viagra levitra and cialis. This allows increased bloodflow into the penis which is necessary to achieve and maintain an erection comparison of viagra levitra and cialis.
• Levitra is used to treat erectile dysfunction (impotence) comparison of viagra levitra and cialis.
• Levitra may also be used for purposes other than those listed in thismedication guide comparison of viagra levitra and cialis.

What should I discuss with my healthcare provider before taking Levitra?
• Do not take Levitra 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 comparison of viagra levitra and cialis.
• Taking Levitra with any of these medications may cause very low bloodpressure, possibly resulting in dizziness, fainting, stroke, or heart attack
• Before taking Levitra, tell your doctor if you
· currently have or have ever had a heart attack, stroke, irregular heartbeats,angina (chest pain), or congestive heart failure;
· have high or low blood pressure;
· have a personal or family history of a rare heart condition known asprolongation of the QT interval (long QT syndrome);
· have liver problems;
· have kidney problems;
· have ever had blood problems, including sickle cell anemia, multiplemyeloma, or leukemia;
· have a bleeding or blood clotting disorder;
· have a stomach ulcer;
· a family history of degenerative eye disease (e.g., retinitis pigmentosa);or
· have a physical deformity of the penis such as Peyronie's disease comparison of viagra levitra and cialis.
• You may not be able to take Levitra, or you may require a dosage adjustmentor special monitoring during treatment if you have any of the conditions listedabove comparison of viagra levitra and cialis.
• Although Levitra is not indicated for use by women, it is in the FDApregnancy category B comparison of viagra levitra and cialis. This means that Levitra is not expected to be harmfulto an unborn baby comparison of viagra levitra and cialis. Levitra should not be taken by women comparison of viagra levitra and cialis.
• It is not known whether Levitra passes into breast milk comparison of viagra levitra and cialis. Levitra shouldnot be taken by women comparison of viagra levitra and cialis.
• If you are over 65 years of age, you may be more likely to experienceside effects from Levitra comparison of viagra levitra and cialis. Your doctor may prescribe a lower dose of the medication comparison of viagra levitra and cialis.

How should I take Levitra?
• Take Levitra exactly as directed by your doctor comparison of viagra levitra and cialis. If you do not understandthese directions, ask your pharmacist, nurse, or doctor to explain them to you comparison of viagra levitra and cialis.
• Take each dose with a full glass of water comparison of viagra levitra and cialis.
• Levitra can be taken with or without food comparison of viagra levitra and cialis.
• Levitra is usually taken when needed comparison of viagra levitra and cialis. Generally, it is taken about 1hour before sexual activity comparison of viagra levitra and cialis. The medication can help achieve an erection whensexual stimulation occurs comparison of viagra levitra and cialis. An erection will not occur just by taking a pill comparison of viagra levitra and cialis. Follow your doctor's instructions comparison of viagra levitra and cialis.
• Levitra should not be taken with grapefruit or grapefruit juice comparison of viagra levitra and cialis. Levitracan interact with grapefruit and grapefruit juice, and the interaction may havedangerous effects comparison of viagra levitra and cialis. You should discuss the use of grapefruit and grapefruit juicewith your doctor comparison of viagra levitra and cialis.
• Do not take Levitra more than once a day comparison of viagra levitra and cialis. In some cases, use of Levitramay be restricted to once every 72 hours (3 days) comparison of viagra levitra and cialis. Follow your doctor's instructions comparison of viagra levitra and cialis.
• If you develop dizziness, nausea, or angina (pain, tightness, discomfort,numbness, or tingling in the chest, arms, neck, or jaw) during sexual activity,refrain from further sexual activity and notify your doctor comparison of viagra levitra and cialis.
• Contact your doctor or seek emergency medical attention for any erectionthat lasts longer than 4 hours comparison of viagra levitra and cialis. A sustained erection can damage the penis comparison of viagra levitra and cialis.
• Store this medication at room temperature away from moisture and heat comparison of viagra levitra and cialis.

What happens if I miss a dose?
• Levitra is used as needed, so you are not likely to miss a dose comparison of viagra levitra and cialis.

What happens if I overdose?
• Seek emergency medical attention if an overdose is suspected comparison of viagra levitra and cialis.
• Symptoms of a Levitra overdose are not known, but are likely to includechest pain, back pain, dizziness, an irregular heartbeat, abnormal vision, andswelling of the ankles or legs comparison of viagra levitra and cialis.

What should I avoid while taking Levitra?
• Do not take any other drug used to treat impotence, such as alprostadil(Caverject, Muse, Edex) or yohimbine (Yocon, Yodoxin, others), without firsttalking to your doctor comparison of viagra levitra and cialis.
• Levitra should not be taken with grapefruit or grapefruit juice comparison of viagra levitra and cialis. Levitracan interact with grapefruit and grapefruit juice, and the interaction may havedangerous effects comparison of viagra levitra and cialis. You should discuss the use of grapefruit and grapefruit juicewith your doctor comparison of viagra levitra and cialis.

What are the possible side effects of Levitra?
• If you experience any of the following serious side effects, stop takingLevitra and seek emergency medical attention or contact your doctor immediately:
· an allergic reaction (difficulty breathing; closing of the throat;swelling of the lips, tongue, or face; or hives);
· chest pain or an irregular heartbeats;
· swelling of the ankles or legs;
· shortness of breath;
· prolonged or severe dizziness;
· fainting;
· a prolonged (lasting longer than 4 hours) or painful erection;
· dizziness, nausea, or angina (pain, tightness, discomfort, numbness,or tingling in the chest, arms, neck, or jaw); or
· back pain comparison of viagra levitra and cialis.
• Other, less serious side effects may be more likely to occur comparison of viagra levitra and cialis. Continueto take Levitra and talk to your doctor if you experience
· flushing;
· mild dizziness;
· headache;
· nasal congestion;
· stomach upset;
· sensitivity of the eyes to light; or
· temporary blue tint in vision or other vision abnormalities comparison of viagra levitra and cialis.
• Side effects other than those listed here may also occur comparison of viagra levitra and cialis. Talk to yourdoctor about any side effect that seems unusual or that is especially bothersome comparison of viagra levitra and cialis.

What other drugs will affect Levitra?
• Do not take Levitra 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 comparison of viagra levitra and cialis.
• Taking Levitra with any of these medications may cause very low bloodpressure, possibly resulting in dizziness, fainting, stroke, or heart attack
• Before taking Levitra, tell your doctor if you are taking any of thefollowing medications:
· any other drug used to treat impotence, such as alprostadil (Caverject,Muse, Edex) or yohimbine (Yocon, Yodoxin, others);
· the antibiotic drug erythromycin (E-Mycin, Eryc, Ery-Tab, others);
· an antifungal medication such as itraconazole (Sporanox) or ketoconazole(Nizoral);
· a medication used to treat irregular heartbeats such as quinidine (Quinaglute,Quinidex, Quin-Release), procainamide (Procan SR, Procanbid, Pronestyl), amiodarone(Cordarone, Pacerone), or sotalol (Betapace, Sorine); or
· the HIV medications indinavir (Crixivan) or ritonavir (Norvir) comparison of viagra levitra and cialis.
• You may not be able to take Levitra, or you may require a dosage adjustmentor special monitoring during treatment if you are taking any of the medicineslisted above comparison of viagra levitra and cialis.
• Drugs other than those listed here may also interact with Levitra oraffect your condition comparison of viagra levitra and cialis. Talk to your doctor or pharmacist before taking any prescriptionor over-the-counter medicines, including vitamins, minerals, and herbal products comparison of viagra levitra and cialis.

Where can I get more information?
• Your pharmacist has additional information about Levitra written forhealth professionals that you may read comparison of viagra levitra and cialis.

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