Chloroquine (Aralen)

Aralen (chloroquine) is a Disease Modifying Anti-Rheumatic Drug (DMARD) that is widely used to reduce inflammation (pain and swelling) in the treatment of many types of arthritis and lupus.

Chloroquine is also known as a treatment for malaria, a disease caused by a blood-borne parasite and spread by mosquitoes in many tropical and sub-tropical environments.

Taking Chloroquine

Chloroquine is available as 250 mg oral tablets. The dose is based on lean body weight.

The usual dose ranges from one-half tablet (125 mg) to one tablet (250 mg) per day. The dose should not exceed 3 mg/kg/day of lean body weight.

It can take 8 to 12 weeks for Chloroquine to start working. It is important for people starting this medication to continue to take it every day. It can take up to 6 months to feel the maximum effect.

Important Tests and Risks




Watch rheumatologist Dr. Andy Thompson introduce Chloroquine in a short 1.5 minute video:


Chloroquine Quick Reference Guide