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[klawr-uh-kwin, -kween, klohr-] /ˈklɔr ə kwɪn, -ˌkwin, ˈkloʊr-/
noun, Pharmacology
a synthetic substance, C 18 H 26 ClN 3 , used chiefly to control malaria attacks.
1945-50; chloro-2 + quin(olin)e Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for chloroquine
  • For centuries, the standard treatment was quinine, and then the chemically related compound chloroquine.
  • chloroquine is often used as an anti-malarial medication.
  • However, chloroquine-resistant infections are common in some parts of the world.
  • There is widespread resistance to standard anti-malaria drugs such as chloroquine or primaquine.
British Dictionary definitions for chloroquine


a synthetic drug administered orally to treat malaria. Formula: C18H26ClN3
Word Origin
C20: from chloro- + quin(oline)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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chloroquine in Medicine

chloroquine chlo·ro·quine (klôr'ə-kwīn', -kwēn')
An antimalarial also used in the treatment of hepatic amebiasis and certain skin diseases.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for chloroquine

synthetic drug used in the treatment of malaria. Chloroquine, introduced into medicine in the 1940s, is a member of an important series of chemically related antimalarial agents, the quinoline derivatives. Chloroquine is administered orally as chloroquine phosphate. It also can be given by intramuscular injection as chloroquine hydrochloride. Chloroquine is effective against susceptible strains of the malarial parasites Plasmodium vivax, P. ovale, and P. falciparum, as well as certain parasitic worms and amoebas. Some mild side effects may occur, including headache and abdominal cramps, which are common to antimalarials. Visual impairment may occur with long-term use of chloroquine.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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