Allegra 120mg 10 tabs.
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Description
Fexofenadine (trade names Allegra, Fexidine, Telfast, Fastofen, Tilfur, Vifas, Telfexo, Allerfexo) is an antihistaminepharmaceutical drug used in the treatment of hay fever, allergy symptoms, and urticaria.[2]
It was developed as a successor of and alternative to terfenadine (trade names include Triludan and Seldane), an antihistamine that caused QT interval prolongation, potentially leading to cardiac arrhythmia. Fexofenadine, like other second- and third-generation antihistamines, does not readily cross the blood–brain barrier, and so causes less drowsiness than first-generationhistamine-receptor antagonists. It works by being an antagonist to the H1 receptor.[3]
It has been variously described as either a second-generation[4] or a third-generation antihistamine.[5]
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