A drug used to treat and prevent malaria and certain autoimmune diseases, which works by interfering with parasites and suppressing immune responses.
From chloro- (chlorine) plus -quine (from quinine, the older malaria drug), indicating a synthetic version that includes chlorine.
Chloroquine saved millions of lives from malaria, but this also led to a medical arms race where the malaria parasite evolved resistance—it's a perfect example of why we can never stop innovating in medicine.
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