Do not use any other medicine to treat impotence unless your doctor tells you to. We considered cost, medications available, and whether generic versions were offered to help reduce costs. Some services offer a subscription option where they’ll send your medications every month at a discount. If you do, you may save money with online pharmacies that accept yours. Interactions What drugs and food should I avoid while taking Levitra Vardenafil? More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours. Other warning signs of an unsafe online pharmacy include outdated medication, no customer service, or suspiciously low prices.Levitra. Used for Erectile Dysfunction. Vardenafil is a first-choice medication for erectile dysfunction (ED). It’s no longer sold under the brand name Levitra, but it’s available as generic tablets and orally disintegrating tablets (ODTs). Common side effects of vardenafil include headache, flushing, and stuffy nose. Drug encyclopedia Levitra 20 mg tablet Medication name Uses How to use Side effects Precautions Drug interactions Overdose Notes Missed dose Storage Important note Information last revised August Copyright (c) First Databank, Inc. Here’s the easiest way to use GoodRx to get Levitra cheaper: Download the GoodRx app on your.