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* Levitra works by increasing the natural chemical known as cyclic guanosine monophosphate (cGMP) found in the blood to higher levels than the patient has, to ensure that more blood flow is directed to the penis and aids the patient in obtaining an erection.
* There are no restrictions on taking Levitra, and it can be taken with or without food.
* It works an hour before sex (although can work within 15 minutes), so an erection is not instantaneous, and has been shown to produce harder erections, and sustainable effects when undertaking sexual activities even when taking other medication.
* Levitra will only work when the patient is sexually aroused, and can not give you the ability to have sex all the time or for extremely long periods of time.
* Levitra will only work when the patient is sexually aroused, and can not give you the ability to have sex all the time or for extremely long periods of time. Once the sexual activity is completed, the erection should decrease as the blood flow returns to normal.

What is vardenafil?

* Vardenafil relaxes muscles and increases blood flow to particular areas of the body.
* Vardenafil is used to treat erectile dysfunction (impotence).
* Vardenafil may also be used for purposes other than those listed in this medication guide.

What should I discuss with my doctor before taking vardenafil?

* Do not take vardenafil if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, and others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket). Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). Taking vardenafil with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack.
* A small number of patients have had a sudden loss of eyesight after taking vardenafil. This type of vision loss is caused by decreased blood flow to the optic nerve of the eye. It is not clear whether vardenafil is the actual cause of such vision loss. Sudden vision loss with vardenafil use has occurred most often in people with heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoke or are over 50 years old.
* Before taking vardenafil, tell your doctor if you have:
o heart disease or heart rhythm problems;
o a recent history (in the past 6 months) of a heart attack, angina (chest pain), or congestive heart failure;
o a history of stroke or blood clots;
o a personal or family history of "Long QT syndrome";
o high or low blood pressure;

What happens if I miss a dose?

* Since vardenafil is used as needed, you are not likely to be on a dosing schedule.

What happens if I overdose?

* Seek emergency medical attention if you think you have used too much of this medicine.
* Symptoms of a vardenafil overdose may include back pain, muscle pain, or vision problems.

What should I avoid while taking vardenafil?

* Avoid drinking alcohol, which can increase some of the side effects of vardenafil.
* Grapefruit and grapefruit juice may interact with vardenafil. Discuss the use of grapefruit products with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.

What Are the Side Effects of LEVITRA?

If the patient is on other medication, then consultation with the doctor is a necessary task, as it is important to ensure that Levitra can be prescribed for you in the correct dosage.

Patients suffering from heart disease or high blood pressure may be on alpha blockers. This could prevent Levitra from being successful, as sexual activity combined with both types of medication could cause many side effects that can be more severe.

Usually, the side effects are :

* Headache
* Cold symptoms
* Flushed cheeks
* Dizziness
* Nausea

The effects are minimal and don't last very long, but it is still important to consult with a medical practitioner if these symptoms persist.

The rare instances that have been reported when taking Levitra:

* vision changes, most commonly a colored tinge to objects, or mild color blind effects (with blue and green) can often occur in conjunction with a decrease in the ability to hear clearly, or bouts of tinnitus and dizziness. As yet, it is unknown where the link between Levitra and these side effects is found, although it has been suggested that they are more likely to be seen in patients suffering from high blood pressure or diabetes who are taking medication for the conditions.

* Also, priapism can occur when taking Levitra. Priapism is where the erection that has been maintained during sexual activity does not decrease. This can cause permanent damage to the penis if medical treatment is not sought after a maximum of four hours after sexual activity.