Chloroquine

Chloroquine is a synthetic antimalarial drug that was discovered in 1934. It is used in the treatment of malaria.

Speer, Brian Current therapy in avian medicine and surgery. Elsevier Health Sciences (2015)
Sohsuebngarm, Damnern, et al. The efficacy of artesunate, chloroquine, doxycycline, primaquine and a combination of artesunate and primaquine against avian malaria in broilers Journal of Veterinary Medical Science (2014)
Silveira, P., et a Effect of rutin and chloroquine on White Leghorn chickens infected with Plasmodium (Bennettinia) juxtanucleare. Tropical animal health and production 41.7 (2009)