Levitra may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• headache
• upset stomach
• heartburn
• bloating
• burping
• dizziness
• flushing
• stuffy or runny nose
• flu-like symptoms

Some side effects can be serious. The following symptoms are uncommon, but if you experience any of them, call your doctor immediately:

• erection that lasts longer than 4 hours
• vision changes (seeing blue tinge on objects; difficulty telling the difference between blue and green; or difficulty seeing at night)
• swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
• hoarseness
• difficulty breathing or swallowing
• blurred vision
• fainting
• hives
• rash