antimalarial

adj. serving to prevent or cure malarial fever

Antimalarial drugs are designed to prevent or cure malaria. Some antimalarial agents, particularly chloroquine and hydroxychloroquine, are also used in the treatment of rheumatoid arthritis and lupus associated arthritis. There are many of these drugs currently on the market. This is a partial list.
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Antimalarial /an·ti·ma·lar·i·al/ therapeutically effective against malaria, or an agent with this quality. an·ti·ma·lar·i·al adj. [more]Antimalarial - Community and Resources

Noun
1. a medicinal drug used to prevent or treat malaria
(synonym) antimalarial drug
(hypernym) antiprotozoal, antiprotozoal drug
(hyponym) chloroquine

(a.)
Good against malaria.