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, the FDA said that hydroxychloroquine could cause heart rhythm problems and should not be used outside a hospital setting.
—Suzanne King, Kansas City Star, 13 May 2025
In addition, just as President Donald Trump encouraged hydroxychloroquine and ivermectin to treat COVID-19, both unproven therapies, Kennedy claims that vitamin A supplementation using cod liver oil will prevent and treat measles despite no scientific basis for this intervention.
—Gordon G. Chang, MSNBC Newsweek, 8 Apr. 2025
Oz promoted using the malaria drugs hydroxychloroquine and chloroquine to treat COVID-19, a theory that was debunked but spread by Trump and others for months.
—Ken Alltucker, USA Today, 3 Apr. 2025
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
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Suzanne King, Kansas City Star, 13 May 2025
In addition, just as President Donald Trump encouraged hydroxychloroquine and ivermectin to treat COVID-19, both unproven therapies, Kennedy claims that vitamin A supplementation using cod liver oil will prevent and treat measles despite no scientific basis for this intervention.
—Gordon G. Chang, MSNBC Newsweek, 8 Apr. 2025
Oz promoted using the malaria drugs hydroxychloroquine and chloroquine to treat COVID-19, a theory that was debunked but spread by Trump and others for months.
—Ken Alltucker, USA Today, 3 Apr. 2025
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
See All Example Sentences for hydroxychloroquine
Cite this Entry
“Hydroxychloroquine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydroxychloroquine. Accessed 22 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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