这个词是什么意思？
A potent second-generation histamine H1 antagonist that is effective in the treatment of allergic rhinitis, chronic urticaria, and pollen-induced asthma. Unlike many traditional antihistamines, it does not cause drowsiness or anticholinergic side effects.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D017332 · MeSH 2026。
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