Levitra - Use | Dose | Side Effects
This article was medically reviewed by M.Pharm, Marko Tanaskovic on August 12, 2018. To read more about an author, click here.
Levitra is a medicine that contains an active substance called vardenafil. It belongs to a group of medicines called phosphodiesterase type 5 inhibitors. By blocking this enzyme, Levitra increases blood flow to the genitals, which helps you to get an erection. Therefore, it is used to treat erectile dysfunction or impotence. Sexual stimulation is required for Levitra to work.
Levitra should be avoided in patients allergic to the active substance vardenafil or other similar medicines: sildenafil (Viagra, Kamagra), tadalafil and others. If you are experiencing symptoms of an allergy, such as: swelling, itching, redness, difficulty breathing, contact your doctor immediately.
Levitra should be avoided in patients with non-arteritic ischemic anterior optic neuropathy (NAION), because it can worsen the symptoms in such patients. If you are experiencing any vision problems, discontinue use and contact your doctor immediately.
This medicine should be avoided in patients with heart diseases and in patients who are taking medicines to treat heart disease. Levitra can affect blood pressure and heart rate, and can worsen the symptoms in such patients.
It should never be used in patients taking nitrates (medicines used in the treatment of heart diseases), such as: nitroglycerin, pentaeritiethyl tetranitrate, isosorbide dinitrate and isosorbide mononitrate. Concomitant use of Levitra with these medicines can cause serious side effects.
It should never be used in patients who have had heart attack or stroke, as well as in the patients with low blood pressure (especially in those patients who have a blood pressure lower than 90/60 mmHg).
It is not recommended use of Levitra in patients above the age of 75, especially if they are already taking other medicines.
Levitra should be avoided in patients with liver damage.
Levitra should be avoided in patients with genital abnormalities.
It should not be used in women!
How to use
Levitra should be taken at a dose of 10 mg once a day, 30-60 minutes before sexual activity. The dose may be increased up to 20 mg once a day. The maximum daily dose is 20 mg. If you think that Levitra is too strong for you, the dose may be reduced to 5 mg once a day. Do not take this medicine more than once a day.
Taking this medicine with food can slow the effects of this drug. It is recommended to take this medicine 2 hours after a meal.
It should be avoided in patients under the age of 18 and in patients above the age of 75.
If your erection lasts more than a few hours, or you have a painful erection, contact your doctor immediately.
Use with other medicines (Interactions)
Levitra should be avoided in combination with the following medicines:
- Medicines used in the treatment of heart diseases (medicines known as nitrates), such as: isosorbide mononitrate, isosorbide dinitrate, pentaerithrityl tetranitrate, nitroglycerin, and others. These medicines increase the levels of nitric oxide in the blood, as well as Levitra, therefore increasing the risk of serious side effects!
- Medicines used in the treatment of high blood pressure and benign prostatic enlargement, the medicines known as alpha-blockers, such as: doxazosin, terazosin, prazosin, and others. Concomitant use of these medicines with Levitra, increases the risk of low blood pressure (hypotension).
- Medicines used in the treatment of HIV infection (AIDS), such as: saquinavir, ritonavir, indinavir, and others. These medicines increase the level of Levitra in the blood, increasing the risk of side effects.
- Medicines used in the treatment of fungal infections, such as: ketoconazole, itraconazole, fluconazole, and others. These medicines increase the level of Levitra in the blood up to 10 times, thus increasing the risk of side effects.
- Antibiotics, medicines used to treat bacterial infections, such as: erythromycin, clarithromycin and azithromycin. These medicines may increase the level of Levitra in the blood for up to 4 times, increasing the risk of side effects.
Levitra can be used in combination with alcoholic beverages, because alcohol does not increase the effect of this drug.
Tell your doctor about all medications and herbal products you are using.
Levitra may cause the following side effects:
- vision problems
- rapid heartbeat (tachycardia)
- low blood pressure (hypotension)
- nasal congestion
- hearing loss
- heart attack
- photosensitivity (increased sensitivity to sunlight)
If you are experiencing chest pain, especially if the pain spreads to your left arm, immediately contact your doctor because it can be a symptom of a heart attack! This side effect occurs very rarely.
The most common side effects of Levitra are headache and dizziness.
Information on this website are provided for educational purposes only and are not intended for medical advice, diagnosis or treatment.
If you have any concerns or questions about your health, you should always consult with a physician or other health-care professional.