If you need a higher or lower dose, your doctor may prescribe the regular tablets instead. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Do not take more or less of it or take it more often than prescribed by your doctor. Ask your doctor or pharmacist if you have any questions. Read and follow these instructions carefully.Chest pain or pressure or a fast heartbeat. A heartbeat that does not feel normal. Very bad dizziness or passing out. Weakness on 1 side of the body, trouble speaking or thinking, change in balance, drooping on one side of . Drugs & Supplements Levitra (Vardenafil) Generic Name: Vardenafil Reviewed: March 21, Vardenafil is used in adult men to treat erectile dysfunction (impotence). Vardenafil may also be. Vardenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Vardenafil does not cure erectile dysfunction or .