What Are Some Possible Side Effects of Allegra?

This is NOT a complete list of side effects reported with fexofenadine. The doctor, health care professional, or pharmacist can discuss a more complete list of side effects.

Antihistamines are typically well tolerated, and serious side effects are rare. The more common side effects are usually mild and may go away.

• If combined with a decongestant (Fexofenadine-D), it may cause insomnia or anxiety.



• Antihistamines are more likely to cause dizziness, excessive sedation, lightheadedness, and low blood pressure in elderly individuals.



• Urine retention, dry mouth, headache or blurred vision may occur.