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Hydroxychloroquine
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Hydroxychloroquine

Generic name: hydroxychloroquine [ hye-drox-ee-KLOR-oh-kwin ]
Brand names: Plaquenil, Plaquenil Sulfate, Quineprox
Drug classes:Antimalarial quinolines, Antirheumatics

Medically reviewed by Sanjai Sinha, MD. Last updated on Jul 2, 2020.

What is hydroxychloroquine?

Hydroxychloroquine is a quinoline medicine used to treat or prevent malaria, a disease caused by parasites that enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria.

Hydroxychloroquine is not effective against all strains of malaria, or against malaria in areas where the infection has been resistant to a similar drug called chloroquine.

Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus.

Warnings

Hydroxychloroquine can cause dangerous effects on your heart, especially if you also use certain other medicines including the antibioticazithromycin (Z-Pak). Seek emergency medical attention if you have fast or pounding heartbeats and sudden dizziness (like you might pass out).

Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye that could progress to permanent vision problems.

Stop taking hydroxychloroquine and call your doctor at once if you have blurred vision, trouble focusing, distorted vision, blind spots, trouble reading, changes in your color vision, increased sensitivity to light.