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    Allergies Health Center

    Antihistamines Directory

    Anithistamines work by blocking histamine, which can cause allergy symptoms. Side effects of antihistamines may include dry mouth, drowsiness, and more. Follow the links below to find WebMD's comprehensive coverage about how antihistamines work, who should take them, and much more.

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    Thumbnail: How to Survive Spring Allergy Season

    Get tips on how to manage your hay fever with drugs, nasal sprays, allergy shots, and more.

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