H1 receptor antagonistic contain..
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Answer:H1 Antagonists (second-generation antihistamines)
These agents are preferred for acute and chronic urticaria, with first-generation agents reserved for efractory cases. Commonly used H1 antagonists currently available in the United States are cetirizine, levocetirizine, desloratadine, loratadine, and fexofenadine.
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