noun Physiology, Pharmacology.
any of certain compounds or medicines that neutralize or inhibit the effect of histamine in the body, used chiefly in the treatment of allergic disorders and colds.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for antihistamine
Contemporary Examples of antihistamine
“He gave me a blue pill, which he said was an antihistamine,” said Chelan.
And, Zyrtec, an antihistamine, was the highest grossing nonfood of 2008, coming in at $316 million in sales.
Elvis also had the painkillers morphine and Demerol; tranquilizers Placidyl and Valium; and Chlorpheniramine, an antihistamine.
British Dictionary definitions for antihistamine
any drug that neutralizes the effects of histamine, used esp in the treatment of allergies
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for antihistamine
Online Etymology Dictionary, © 2010 Douglas Harper
antihistamine in Medicine
Related formsan′ti•his′ta•mine′ adj.
Any of several drugs used to counteract the physiological effects of histamine.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Any of various drugs that relieve cold or allergy symptoms by blocking the action of histamine.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.