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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: Blocking Allergy Symptoms: How Pretreatment Works

Tackle allergies before they start, and you could be breathing a lot easier.

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