Sudden loss or decrease in hearing, sometimes with ringing in the ears and dizziness, has been rarely reported in people taking PDE5 inhibitors, including Levitra. Interactions What drugs and food should I avoid while taking Levitra Vardenafil? If you are older than 65 or have liver problems, your doctor may start you on a lower dose of Levitra. You should contact the prescribing physician if alpha-blockers or other drugs that lower blood pressure are prescribed by another healthcare provider. Use Levitra Vardenafil exactly as directed on the label, or as prescribed by your doctor. Vardenafil also does not have an effect on PDE6, which means that it does not have vision adverse effects.You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil w. Levitra helps increase blood flow to the penis and may help men with ED get and keep an erection satisfactory for sexual activity. Once a man has completed sexual activity, blood flow to his penis decreases, and his erection goes away. In combination with sexual stimulation, vardenafil works by increasing blood flow to the penis to help a man get and keep an drug does not protect against sexually transmitted.