Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. How to stop diarrhea caused by hydroxychloroquine Plaquenil side effects neuropathy Plaquenil rheumatoid arthritis dosage Hydroxychloroquine is an investigational drug that is categorized as an immune modulator. 2 Immune modulators also called immunomodulators are substances that help to activate, boost, or restore normal immune function. The types of drugs that have been used to treat lupus include NSAIDs, corticosteroids and other immune system suppressing drugs, hydroxychloroquine, and the newest lupus drug, Benlysta. Lupus. Hydroxychloroquine, sold under the brand name Plaquenil among others, is a medication used for the prevention and treatment of certain types of malaria. Specifically it is used for chloroquine-sensitive malaria. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth. Common side effects include vomiting, headache, changes in vision and muscle weakness. Severe side effects may include allergic reactions. It does not appear to be safe during Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Is hydroxychloroquine sulfate an immune suppressing drug Hydroxychloroquine Plaquenil Side Effects & Dosage for., Lupus Medications and Treatments Black cohosh and plaquenil The mechanism is unknown. Combining telbivudine Tyzeka and hydroxychloroquine may increase the risk of unexplained muscle pain, tenderness, or weakness because both drugs cause such side effects. Hydroxychloroquine suppresses the immune system and should not be combined with drugs that also suppress the immune system or live vaccines. Hydroxychloroquine Plaquenil Side Effects & Dosage for Malaria. Hydroxychloroquine - Wikipedia. Hydroxychloroquine Dosage Guide with Precautions -. The study is based on hydroxychloroquine sulfate the active ingredients of Plaquenil and Plaquenil the brand name. Other drugs that have the same active ingredients e.g. generic drugs are not considered. Dosage of drugs is not considered in the study. It is listed as having a mild immunosuppressant effect in my book on RA, but one of the reasons for the blood tests is to check that your immune system is not being suppressed too much eg checking your white blood cell levels, so you shouldn't be completely vulnerable. Aug 02, 2010 Basically, the immune system is a bit out of control. Plaquenil works by suppressing the immune system. Unfortunately you can't tell it to attack just the germs so you suppress all of its function to spare your healthy tissue- in your husband's case, his eyes, mouth, throat. NOTE Plaquinil and hydroxychloroquine are essentially the same drug.