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Fexofenadine

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Information about Fexofenadine

Fexofenadine is a second generation antihistamine that is used for the treatment of allergic rhinitis, angioedema and chronic urticaria.

Fexofenadine
Fexofenadine

Liver safety of Fexofenadine

Fexofenadine has not been linked to serum enzyme elevations during therapy or to instances of clinically apparent acute liver injury.

Mechanism of action of Fexofenadine

Fexofenadine (fex" oh fen' a deen) is a second generation antihistamine (H1 receptor blocker) that is used widely to treat allergic symptoms associated with hay fever, seasonal allergies, urticaria, angioedema and atopic dermatitis. Fexofenadine, like other second generation antihistamines, is considered to be nonsedating, and prospective studies have shown that sedation is less common with it than with first generation antihistamines such as diphenhydramine.

FDA approval information for Fexofenadine

Fexofenadine was approved for use by prescription in the United States in 1996 and as an over-the-counter medication in 2011. Fexofenadine is one of the most widely used medications with more than 18 million prescriptions filled yearly in addition to considerable nonprescription use.

Dosage and administration for Fexofenadine

Fexofenadine is available in 30, 60 and 180 mg tablets and capsules in generic forms and under the trade name Allegra. Oral suspensions, extended release tablets, and combinations with pseudoephrine are also available. The typical dose in adults is 30 to 60 mg twice daily or 180 mg once daily. Fexofenadine is often given chronically, at least during allergic season.

Side effects of Fexofenadine

Common side effects include blurred vision, dry mouth and throat, palpitations, tachycardia, abdominal distress, constipation and headache. Although considered to be a nonsedating antihistamine, fexofenadine can cause mild drowsiness particularly at higher doses. Antihistamines can worsen urinary retention and glaucoma.

First Generation Antihistamines

Second Generation Antihistamines

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