Levitra helps increase blood flow to the penis and may help men with ED get and keep an erection satisfactory for sexual activity. If you need emergency medical care for a heart problem, it will be important for your healthcare provider to know when you last took Levitra. It is uncertain whether PDE5 inhibitors directly cause the vision loss. Some form of sexual stimulation is needed for an erection to happen with Levitra. What is the most important information I should know about Levitra?Vardenafil, sold under the brand name Levitra among others, is a medication that is used for treating erectile dysfunction. It is a PDE5 inhibitor. It is taken by mouth. About Vardenafil (Levitra) for ED. 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. Hearing loss or ringing in ears. Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded. Low blood pressure—dizziness, feeling faint or lightheaded, .