chloroquine

[klawr-uh-kwin, -kween, klohr-]
noun Pharmacology.
a synthetic substance, C 18 H 26 ClN 3 , used chiefly to control malaria attacks.

Origin:
1945–50; chloro-2 + quin(olin)e

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Collins
World English Dictionary
chloroquine (ˈklɔːrəʊˌkwiːn)
 
n
a synthetic drug administered orally to treat malaria. Formula: C18H26ClN3
 
[C20: from chloro- + quin(oline)]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

chloroquine chlo·ro·quine (klôr'ə-kwīn', -kwēn')
n.
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 Britannica
Encyclopedia

chloroquine

syntheticsynthetic 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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Example sentences
For centuries, the standard treatment was quinine, and then the chemically related compound chloroquine.
Chloroquine is often used as an anti-malarial medication.
There is widespread resistance to standard anti-malaria drugs such as chloroquine or primaquine.
However, chloroquine-resistant infections are common in some parts of the world.
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