抗疟药（antimalarial drug）是指用来预防或者治疗疟疾的药物。代表药物有奎宁、氯喹、青蒿素等。抗疟药如进一步按功用细分，尚可分为控制疟疾症状的抗疟药、防止疟疾复发的抗疟药，以及预防疟疾的抗疟药三大类。

Antimalarial medications, also known as antimalarials, are designed to prevent or cure malaria. Such drugs may be used for some or all of the following:

Some antimalarial agents, particularly chloroquine and hydroxychloroquine, are also used in the treatment of rheumatoid arthritis and lupus-associated arthritis.