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. Does chloroquine interact with vitamins Uses for hydroxychloroquine Chloroquine in lupus Plaquenil Oral tablet drug summary. Find medication information including related drug classes, side effects, patient statistics and answers to frequently asked questions. Visit for more details. Drug Information on Plaquenil, Plaquenil Sulfate, Quineprox hydroxychloroquine includes side effects, uses, drug interactions, dosage, drug pictures, overdose symptoms, and what to avoid. Hydroxychloroquine sulfate is a colorless crystalline solid, soluble in water to at least 20 percent; chemically the drug is 2-4-7-Chloro-4-quinolylaminopentylethylamino ethanol sulfate 11. PLAQUENIL hydroxychloroquine sulfate tablets contain 200 mg hydroxychloroquine sulfate, equivalent to 155 mg base, and are for oral administration. 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 oral side effects Hydroxychloroquine Side Effects, Dosage, Uses, and More, Plaquenil, Plaquenil Sulfate, Quineprox hydroxychloroquine. Can plaquenil help osteoarthritisMechanism of action of chloroquine in malaria treatmentChloroquine blood plasma ratio Find information about which conditions Plaquenil Oral is commonly used to treat. What Conditions does Plaquenil Treat. Medication Side Effects. What Conditions does Plaquenil Treat? - WebMD. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Plaquenil Side Effects on Your Eyes and Vision. Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction Serious Side Effects of Plaquenil. If you are taking Plaquenil long-term, such as for an autoimmune condition, your doctor should regularly check you for potential serious side effects. 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.