Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction) by blocking a certain enzyme (phosphodiesterase-PDE5). In combination with sexual stimulation, vardenafil works by helping the blood flow into the penis to achieve and maintain an erection. This drug is not indicated for use in women. Use of this drug does not protect against sexually transmitted diseases (e.g., HIV, hepatitis B, gonorrhea, syphilis). Practice "safe sex" such as using latex condoms. Consult your doctor or pharmacist for more details. How to use LEVITRA Oral This drug is taken by mouth as needed, 1 hour before sexual activity with or without food; or use as directed by your doctor. Do not take more often than once daily as needed. A high fat meal may decrease the amount of drug that is absorbed. Avoid eating grapefruit or drinking grapefruit juice while you are being treated with this medication unless your doctor instructs you otherwise. The dosage is based on your medical condition, response to therapy, and other medications you may be taking (see also Drug Interactions section). Consult your doctor or pharmacist for more details. Read the patient information leaflet provided by your pharmacist and ask questions if any of the information is unclear.

Courtesy drugs.com