2 doctors weighed in:
What are the side effects of allegra (fexofenadine hcl) ?
2 doctors weighed in

Dr. Shahid Randhawa
Internal Medicine - Allergy & Immunology
1 doctor agrees
In brief: Less common
All medications have side effects.
Fexofenadine (allegra) is a newer or second generation anti-histamine. It does not cause usual side effects associated with older or first generation antihistamines such as drowsiness, dry mouth, urinary retention or palpitations. Some sensitive persons complains of mild drowsiness. Other listed side effects include headache, heart burn, muscle pain, somnolence.

In brief: Less common
All medications have side effects.
Fexofenadine (allegra) is a newer or second generation anti-histamine. It does not cause usual side effects associated with older or first generation antihistamines such as drowsiness, dry mouth, urinary retention or palpitations. Some sensitive persons complains of mild drowsiness. Other listed side effects include headache, heart burn, muscle pain, somnolence.
Dr. Shahid Randhawa
Dr. Shahid Randhawa
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