Description and Brand Names

Drug information provided by: Micromedex

US Brand Name

  1. Aralen Phosphate


Chloroquine is used to prevent and treat malaria. It is also used to treat liver infection caused by protozoa (extraintestinal amebiasis).

Chloroquine belongs to a group of medicines known as antimalarials. It works by preventing or treating malaria, a red blood cell infection transmitted by the bite of a mosquito.

Malaria transmission occurs in large areas of Central and South America, Hispaniola, sub-Saharan Africa, the Indian subcontinent, Southeast Asia, the Middle East, and Oceania. Country-specific information on malaria can be obtained from the Centers for Disease Control and Prevention (CDC), or from the CDC's web site at

This medicine is available only with your doctor's prescription.

Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although these uses are not included in product labeling, chloroquine is used in certain patients with the following medical conditions:

  • Arthritis in children.
  • High levels of calcium in the blood associated with sarcoidosis.
  • Rheumatoid arthritis.
  • Systemic lupus erythematosus.
  • Various skin disorders.

For patients taking chloroquine for arthritis or lupus:

  • This medicine must be taken regularly as ordered by your doctor in order for it to help you. It may take up to several weeks before you begin to feel better. It may take up to 6 months before you feel the full benefit of this medicine.
  • If your symptoms of arthritis do not improve within a few weeks or months, or if they become worse, check with your doctor.

This product is available in the following dosage forms:

  • Tablet