Vardenafil can be taken with or without food. Also, in rare cases, vardenafil use may cause priapism, a very painful emergency condition that can cause impotence if left untreated. Store at room temperature away from moisture and heat. Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. If you receive medical care for heart problems, tell your caregivers when you last took vardenafil. Call your doctor for medical advice about side effects. Beyond its indications for erectile dysfunction, vardenafil may be effective in the treatment of premature ejaculation , where it may significantly increase the time from penetration to ejaculation.What is this medication? VARDENAFIL (var DEN a fil) treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps to maintain an erection. This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions. COMMON BRAND NAME (S): Levitra Advertisement. 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 used. Vardenafil (Levitra): Uses, Alternatives, Side Effects & More – GoodRx. feeling faint or weak, dizziness, blurry vision, feeling confused. Erection lasting for more than 4 hours. Headache (up to 15%) Flushing (up to 11%) Stuffy nose (up to 9%) Indigestion (up to 4%) —skin rash,, swelling of the face, lips, tongue, or throat.