It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Plaquenil patient assistance Low cost hydroxychloroquine They dont know how Plaquenil works, and thats why you cant get a straight answer. All they know is that it slows down the immune system from attacking itself. It was kind of a mistake that they discovered this. This drug is used to treat/prevent malaria. So again I was just trying to share some information. Good luck Melissa Note This document contains side effect information about hydroxychloroquine. Some of the dosage forms listed on this page may not apply to the brand name Plaquenil. For the Consumer. Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. Hydroxychloroquine Plaquenil is considered a disease-modifying anti-rheumatic drug DMARD. It can decrease the pain and swelling of arthritis. It may prevent joint damage and reduce the risk of long-term disability. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. Plaquenil treats graves Plaquenil Oral Uses, Side Effects, Interactions., Plaquenil Side Effects Common, Severe, Long Term - Plaquenil and vascular systemRa med hydroxychloroquineAllergic reaction to hydroxychloroquine burn how long Anti-thyroid drugs may also be used before or after radioiodine therapy as a supplemental treatment. Side effects of both drugs include rash, joint pain, liver failure or a decrease in disease-fighting white blood cells. Methimazole isn't used to treat pregnant women in the first trimester because of the slight risk of birth defects. Graves' disease - Diagnosis and treatment - Mayo Clinic. Hydroxychloroquine Plaquenil. Plaquenil Oral Uses, Side Effects, Interactions, Pictures.. Apr 19, 2018 Hydroxychloroquine Plaquenil is a medication that was originally used to prevent or treat malaria. However, during World War II, it was found that this medication was also effective in treating the symptoms of lupus, rheumatoid arthritis and other autoimmune diseases. Malaria caused by the Protozoa Plasmodium Falciparum Preventive Treatment of Vivax Malaria malaria prevention systemic lupus erythematosus Preventive Treatment of Quartan Malaria Preventive Treatment of Ovale Malaria Malaria caused by the Protozoa Plasmodium Vivax disease that causes disc-shaped patches on upper body Plaquenil hydroxychloroquine is an antimalarial medication used to treat or prevent malaria, a disease caused by parasites, which enter the body through the bite of a mosquito. Plaquenil is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus.