Ans: Chloroquine phosphate is a widely used medicine for treating and preventing malaria. These are also used for treating amebiasis. Chloroquine phosphate belongs to the drug class called amebicides and antimalarials. The Aralen is a brand name for the antimalarial drug, chloroquine. Hydroxychloroquine is similar to chloroquine and it is useful for treating amebiasis and several forms of malaria. This can treat amebiasis which is spread outside the intestine.