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Allegra contains Fexofenadine as an active ingredient which is a H1 histamine receptor antagonist; competes for H1-receptor sites in target cells in the respiratory tract, blood vessels, and gastrointestinal tract; major metabolite of terfenadine.
Seasonal Allergic Rhinitis/Chronic Idiopathic Urticaria,
Direction to Use
The recommended dose is one tablet daily. Take your tablet with water before a meal.
Common Side Effects of Allegra are Headache, Drowsiness, Nausea, Dizziness.