Antihistamine Definition

ăntē-hĭstə-mēn, -mĭn, ăntī-
antihistamines
noun
A drug used to counteract the physiological effects of histamine production in allergic reactions and colds.
American Heritage
Any of several synthetic drugs used to minimize or prevent the action of histamine, as in an allergic condition.
Webster's New World
Any of various drugs used to counteract the physiological effects of histamine production in allergic reactions and colds.
American Heritage Medicine

A drug or substance that counteracts the effects of a histamine. Commonly used to alleviate the symptoms of hay fever and other allergies.

Wiktionary

Other Word Forms of Antihistamine

Noun

Singular:
antihistamine
Plural:
antihistamines

Origin of Antihistamine

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antihistamine