Zhewitra is used to treat impotence or erectile dysfunction (ED) in males. The medical condition when a male loses the ability to get and maintain an erection is called ED. Physicians may prescribe this medication to treat other medical conditions such as pulmonary arterial hypertension (PAH), benign prostatic hyperplasia (BPH), and other conditions. Vardenafil is the active ingredient of the Zhewitra 20 mg.