Skip to content
    Font Size

    Antimalarials for Juvenile Idiopathic Arthritis


    Generic Name Brand Name
    hydroxychloroquine Plaquenil

    How It Works

    Antimalarial medicines (normally used to prevent and treat malaria) are sometimes used in an attempt to reduce inflammation associated with juvenile idiopathic arthritis (JIA).

    Why It Is Used

    Antimalarial medicines may be used along with nonsteroidal anti-inflammatory drugs (NSAIDs) for arthritis that has not responded to NSAIDs alone. This combination is more commonly used to treat progressive polyarticular arthritis but can be used for any form of JIA.

    How Well It Works

    Although some people get better with antimalarials, a large study of the effects of antimalarial treatment for JIA showed them to be no better than a placebo.1 It may take up to 16 weeks to see an effect from hydroxychloroquine. The medicine is usually discontinued if no improvement is seen after 16 weeks.

    Side Effects

    All medicines have side effects. But many people don't feel the side effects, or they are able to deal with them. Ask your pharmacist about the side effects of each medicine your child takes. Side effects are also listed in the information that comes with the medicine.

    Here are some important things to think about:

    • Usually the benefits of the medicine are more important than any minor side effects.
    • Side effects may go away after your child takes the medicine for a while.
    • If side effects still bother your child and you wonder if he or she should keep taking the medicine, call your doctor. He or she may be able to lower the dose or change the medicine. Do not suddenly quit taking your medicine unless your doctor tells you to.

    Call911or other emergency services right away if your child has:

    Call your doctor right away if your child has:

    • Hives.
    • Any blurred vision, problems seeing to read, or changes in vision. Your doctor may have you check your child's vision at least once a month using an Amsler grid camera.gif. This is a chart with lines and a dot at the center. The chart lets you monitor changes in vision. If you or your child notices any changes in vision or changes in his or her view of the Amsler grid, call your doctor.

    Common side effects of this medicine include:

    See Drug Reference for a full list of side effects. (Drug Reference is not available in all systems.)

    What To Think About

    Some antimalarial medicines, such as hydroxychloroquine, can cause serious and permanent damage to the retina of the eye. When appropriate doses are given, this is rare. If it is found early, eye damage may be reversed and permanent damage may be prevented. So your child will need to have an initial ophthalmic examination before beginning antimalarial therapy and examinations if and when you or your child notices a change in vision. Your doctor may recommend visits to the ophthalmologist as often as every 3 to 12 months, depending on your child's vision and your doctor's level of concern about eye disease from JIA.

    Taking medicine

    Medicine is one of the many tools your doctor has to treat a health problem. If your child takes medicine as your doctor suggests, it will improve your child's health and may prevent future problems. If your child doesn't take the medicines properly, his or her health (and perhaps life) may be at risk.

    There are many reasons why people have trouble taking their medicine. But in most cases, there is something you can do. For suggestions on how to work around common problems, see the topic Taking Medicines as Prescribed.


    Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor if your child is having problems. It's also a good idea to know your child's test results and keep a list of the medicines your child takes.

    Complete the new medication information form (PDF)(What is a PDF document?) to help you understand this medication.


    1. Nistala K, et al. (2009). Juvenile idiopathic arthritis. In GS Firestein et al., eds., Kelley's Textbook of Rheumatology, 8th ed., vol. 2, pp. 1657-1675. Philadelphia: Saunders Elsevier.

    ByHealthwise Staff
    Primary Medical ReviewerSusan C. Kim, MD - Pediatrics
    Specialist Medical ReviewerJohn Pope, MD - Pediatrics

    Current as ofSeptember 9, 2014

    WebMD Medical Reference from Healthwise

    Last Updated: September 09, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

    Today on WebMD

    rubbing hands
    Avoid these 6 common mistakes.
    mature couple exercising
    Decrease pain, increase energy.
    mature woman threading needle
    How much do you know?
    Swelling, fatigue, pain, and more.
    Lucille Ball
    Hand bones X-ray
    prescription pills
    Woman massaging her neck
    woman roasting vegetables in oven
    Woman rubbing shoulder
    doctor and patient hand examination