Common side effects include headache, facial flushing, indigestion, and dizziness. Drinking alcohol can increase certain side effects of vardenafil. Call your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. You can see an in-person provider or speak with a doctor virtually. It’s available in 25 mg, 50 mg, and mg tablets and lasts up to 18 hours. However, all medications come with risks. We considered cost, medications available, and whether generic versions were offered to help reduce costs.You can buy it under its generic name or under the brand names Levitra and Staxyn. Vardenafil is FDA approved to treat erectile dysfunction (ED). It works by allowing more . Levitra 20 mg tablet. Medication name. Uses How to use Side effects Precautions Drug interactions Overdose Notes Missed dose Storage Important note. Information last . Print Save. Levitra Prices, Coupons and Patient Assistance Programs. Levitra (vardenafil) is a member of the impotence agents drug class and is commonly used for Erectile .