Ranbaxy is also codeveloping an antimalarial drug with the Geneva-based nonprofit Medicines for Malaria Venture.

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Other lupus sufferers might be prescribed an antimalarial drug called hydroxychloroquine.

CNN: Learning to live with lupus

But the only firm that achieved any success was Novartis, which in 1998 developed Coartem, an antimalarial drug that combines artemisinin, an extract from the sweet wormwood plant, with a compound called lumefantrine.

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