Mô tả
Manufacturer
Bayer
Contents
Vardenafil
Indication
Levitra is indicated for the treatment of erectile dysfunction. Levitra is a phosphodiesterase inhibitor that works by helping the blood flow into the penis to achieve and maintain an erection.
Instruction
Use Levitra as directed by your doctor.
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Take Levitra by mouth with or without food.
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Take Levitra about 1 hour before sexual activity.
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Do not take Levitra more often than once daily, or as directed by your doctor.
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Check with your doctor before you eat grapefruit or drink grapefruit juice while you use Levitra.
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If you miss a dose of Levitra and you still intend to engage in sexual activity, take it as soon as you remember. Continue to take it as directed by your doctor.
Some men can only take a low dose of Levitra because of medical conditions or medicines they take. Your doctor will prescribe the dose that is right for you.
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If you are older than 65 or have liver problems, your doctor may start you on a lower dose of Levitra.
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If you have prostate problems or high blood pressure, for which you take medicines called alpha-blockers, your doctor may start you on a lower dose of Levitra.
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If you are taking certain other medicines your doctor may prescribe a lower starting dose and limit you to one dose of Levitra in a 72-hour (3 days) period.
Ask your health care provider any questions you may have about how to use Levitra.
Drug interaction
Levitra's metabolism is inhibited by erythromycin, ketoconazole (Nizoral), itraconazole (Sporanox), indinavir (Crixivan) and ritonavir (Norvir). Levitra reduces the concentration of ritonavir and indinavir. In patients treated with nitrates Levitra may aggravate chest pain by increasing heart rate and lowering blood pressure. Levitra is able to exaggerate the blood pressure lowering effects of alpha-blocking drugs (terazosin or Hytrin). Levitra never should be administered in patients who are treated with organic nitrates.
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