Chloroquine is used to treat or prevent certain diseases caused by parasitic or bacterial infections. It is particularly effective in cases of malaria, where it is used to treat or prevent it, especially if the infection is caused by certain types of parasites that are sensitive to this drug.
Chloroquine may also be used to treat other diseases such as chronic inflammation associated with some autoimmune disorders, such as rheumatoid arthritis and lupus erythematosus, as it helps reduce inflammation and control symptoms.