Levitra relaxes muscles and increases blood flow to particular areas of the body and is used to treat erectile dysfunction. Learn about side effects, interactions and indications. Levitra 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. Levitra is a phosphodiesterase 5 (PDE5) inhibitor taken by mouth for the treatment of erectile dysfunction (ED) in men. Find patient medical information for Vardenafil (Levitra, Staxyn) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings COMMON BRAND NAME (S): Levitra What should I tell my care team before I take this medication? They need to know if you have any of these conditions: Abnormal penis shape or Peyronie's disease Bleeding disorders Eye or vision problems, including a rare inherited eye disease called retinitis pigmentosa Levitra (vardenafil hydrochloride) is an oral medication taken to treat erectile dysfunction (ED). It’s in the same class of drugs as other popular ED medications, including Viagra and Cialis. Levitra (Vardenafil HCl) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources.