hydroxychloroquine
noun
hy·droxy·chlor·o·quine
hī-ˌdräk-sē-ˈklȯr-ə-ˌkwēn 
-kwin
: a drug derived from quinolone that is taken orally in the form of its sulfate C18H26ClN3O·H2SO4 to treat malaria, rheumatoid arthritis, and lupus erythematosus
Two commonly used antimalarials are chloroquine and hydroxychloroquine, both generic drugs.—
Consumer Reports
Consumer ReportsOriginally an antimalarial drug, hydroxychloroquine is often … prescribed to people with mild, slowly progressing arthritis.—Samir Sutaria
Samir SutariaExamples of hydroxychloroquine in a Sentence
Recent Examples on the Web
In 2020, during the height of the COVID-19 pandemic and while the president was taking hydroxychloroquine as a preventative measure, his weight was pegged at 244 pounds.
—Matthew Medsger, Boston Herald, 13 Apr. 2025
One of the most notable scientific papers that first popularized hydroxychloroquine as a COVID-19 treatment was retracted from its journal due to ethical and methodological issues.
—Youri Benadjaoud, ABC News, 18 Dec. 2024
Common antimalarial drugs that cause tinnitus include quinine, hydroxychloroquine, and chloroquine.
—Ayesha Gulzar, Verywell Health, 13 Dec. 2024
Early in the pandemic, Janet Woodcock, then the head of the FDA’s drug center, reportedly sprang into action to prevent widespread distribution of the unproven COVID treatment hydroxychloroquine over the orders of top Trump officials.
—Nicholas Florko, The Atlantic, 27 Feb. 2025
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Matthew Medsger, Boston Herald, 13 Apr. 2025
One of the most notable scientific papers that first popularized hydroxychloroquine as a COVID-19 treatment was retracted from its journal due to ethical and methodological issues.
—Youri Benadjaoud, ABC News, 18 Dec. 2024
Common antimalarial drugs that cause tinnitus include quinine, hydroxychloroquine, and chloroquine.
—Ayesha Gulzar, Verywell Health, 13 Dec. 2024
Early in the pandemic, Janet Woodcock, then the head of the FDA’s drug center, reportedly sprang into action to prevent widespread distribution of the unproven COVID treatment hydroxychloroquine over the orders of top Trump officials.
—Nicholas Florko, The Atlantic, 27 Feb. 2025
See All Example Sentences for hydroxychloroquine
Cite this Entry
“Hydroxychloroquine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydroxychloroquine. Accessed 2 May. 2025.
Copy CitationMedical Definition
hydroxychloroquine
noun
hy·droxy·chlor·o·quine
-ˈklōr-ə-ˌkwēn, -kwin
: a drug derived from quinoline that is administered orally in the form of its sulfate C18H26ClN3O·H2SO4 to treat malaria, rheumatoid arthritis, and lupus erythematosus see plaquenil
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