quinidine
noun
quin·i·dine
ˈkwi-nə-ˌdēn 
: an alkaloid C20H24N2O2 that is stereoisomeric with quinine and is used in the form of its sulfate or gluconate to treat cardiac rhythm irregularities
Examples of quinidine in a Sentence
Recent Examples on the Web
As quinidine supplies dwindled, the Centers for Disease Control and Prevention made available artesunate, a better drug that is the international gold standard for treating severe malaria, free of charge via request.
—
Aileen Ahiskali, STAT, 12 June 2021
Artesunate costs about $30,000 for an average course of treatment for an adult, compared to less than $200 for quinidine in 2018.
—Aileen Ahiskali, STAT, 12 June 2021
The treatment system that has emerged in the absence of quinidine is far from perfect, Travassos said.
—Haley Weiss, Scientific American, 23 Aug. 2019
Pharmaceutical companies other than Eli Lilly could step in and manufacture quinidine in the meantime, a solution that Travassos conceded is unlikely to happen without financial incentives.
—Haley Weiss, Scientific American, 23 Aug. 2019
Some of the drugs were discovered a century ago or earlier, including benzocaine (a local anesthetic sometimes put in cough drops) and quinidine (a treatment for heart rhythm disorders).
—Jonathan Saltzman, BostonGlobe.com, 12 May 2018
In the early 2000s, Smith combined dextromethorphan — the main ingredient in cough syrups such as Robitussin — with quinidine, a drug used to treat irregular heart rhythms.
—Julie Appleby, Kaiser Health News, 16 May 2017
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Aileen Ahiskali, STAT, 12 June 2021
Artesunate costs about $30,000 for an average course of treatment for an adult, compared to less than $200 for quinidine in 2018.
—Aileen Ahiskali, STAT, 12 June 2021
The treatment system that has emerged in the absence of quinidine is far from perfect, Travassos said.
—Haley Weiss, Scientific American, 23 Aug. 2019
Pharmaceutical companies other than Eli Lilly could step in and manufacture quinidine in the meantime, a solution that Travassos conceded is unlikely to happen without financial incentives.
—Haley Weiss, Scientific American, 23 Aug. 2019
Some of the drugs were discovered a century ago or earlier, including benzocaine (a local anesthetic sometimes put in cough drops) and quinidine (a treatment for heart rhythm disorders).
—Jonathan Saltzman, BostonGlobe.com, 12 May 2018
In the early 2000s, Smith combined dextromethorphan — the main ingredient in cough syrups such as Robitussin — with quinidine, a drug used to treat irregular heart rhythms.
—Julie Appleby, Kaiser Health News, 16 May 2017
Cite this Entry
“Quinidine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quinidine. Accessed 18 Jul. 2025.
Copy CitationMedical Definition
quinidine
noun
quin·i·dine
ˈkwin-ə-ˌdēn
-dən
-dən
: a crystalline dextrorotatory stereoisomer of quinine found in some species of cinchona and used chiefly in the form of its hydrated sulfate (C20H24N2O2)2·H2SO4·2H2O to treat irregularities of cardiac rhythm and sometimes in place of quinine as an antimalarial
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