Definition of hydroxychloroquine
: 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 Originally an antimalarial drug, hydroxychloroquine is often … prescribed to people with mild, slowly progressing arthritis.— Samir Sutaria
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Merriam-Webster unabridged
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Time Traveler for hydroxychloroquine
The first known use of hydroxychloroquine was in 1951
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