Allegra (fexofenadine), Zyrtec (cetirizine), and Claritin (loratadine) are over-the-counter (OTC) antihistamines. These allergy pills are used to treat hives, itchy skin, post-nasal drip, and other ...
Eight-hundred and thirty-six patients were randomised to therapy at 25 sites in the United States and received at least one dose of loratadine (n = 357), fexofenadine (n = 360) or placebo (n = 119).
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