Fexofenadine hydrochloride (brand names include Allegra® and Telfast®) is an antihistamine drug used in the treatment of hayfever and similar allergy symptoms. It was developed as a successor of and alternative to terfenadine, an antihistamine with potentially fatal contraindications. Fexofenadine, like other second-generation antihistamines, does not readily enter the brain from the blood, and so causes less drowsiness than first-generation histamine-receptor antagonists.
Antihistamines :: Drugs and Medications

Allegra (Fexofenadine) - Relieves allergy symptoms in patients 12 and over.
Meta Description: [ Allegra provides nondrowsy allergy relief from seasonal allergy symptoms like sneezing, runny nose, itchy nose or throat, or itchy, watery red eyes for a full 24 hours. ]
DrugDigest: Allegra - Information on dosage, usage, side effects, interactions, and drug comparisons including generics when available.
MedlinePlus: Fexofenadine (Systemic) - Patient's guide to this medication provided by the United States Pharmacopeia.
Meta Description: [ Fexofenadine(Systemic) ]
MedlinePlus: Fexofenadine and Pseudoephedrine (Systemic) - Patient's guide to this medication also known as Allegra-D provided by the United States Pharmacopeia.
Meta Description: [ Fexofenadine and Pseudoephedrine(Systemic) ]