Stop using vardenafil and call your doctor at once if you have: ringing in your ears, or sudden hearing loss; irregular heartbeat; swelling in your hands, ankles, or feet; shortness of breath; a light-headed feeling, like you might pass out; or seizure convulsions. Main article: PDE5 inhibitor Vardenafil’s indications and contraindications are the same as with other PDE5 inhibitors; it is closely related in function to sildenafil citrate Viagra and tadalafil Cialis. Place the tablet in your mouth and allow it to dissolve without chewing. Call your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. Do not try to push the tablet through the foil. Follow the package directions to remove the tablet from the blister package. Use the medicine exactly as directed.Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil works by increasing blood flow to the. Vardenafil and tadalafil (Cialis) are both first-choice medications for treating ED. However, tadalafil (Cialis) can also be used to treat symptoms from an enlarged prostate. While both medications can be used as needed for sexual activity (up to once a day), it’s possible for some people to take tadalafil (Cialis) daily on a regular basis. Vardenafil is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Vardenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works by increasing blood flow to the penis during sexual stimulation.