Levitra (vardenafil hydrochloride) is a prescription medicine classified as PDE5 inhibitor that can be used by men suffering from erectile dysfunction - those unable to achieve stable erections. Levitra must be taken exactly as recommended by your health care provider to avoid health complications and other problems related to using it incorrectly. If you take Levitra right, the chances of mild side effects (back pain, warmth or redness in your face, neck, or chest, memory problems, stuffy nose, upset stomach, headache, and vision changes) are minimal, but even if any symptoms appear - they will probably go away on their own soon. More serious side effects are quite rare but you need to be aware of the possibility. The following are considered to be serious side effects: feeling light-headed, swelling in your hands, sudden vision loss, sudden hearing loss, sweating, irregular heartbeat, general ill feeling, chest pain, penis erection that is painful or lasts 4 hours or longer, ringing in your ears, shortness of breath, nausea, and seizure. Before taking Levitra tell your doctor if you are using antibiotics, drugs for prostate disorder, heart rhythm medicines, antifungal medications, heart or blood pressure medications, drugs to treat high blood pressure, HIV/AIDS medicines, or antidepressants, as this may affect the dose you are prescribed.