It can decrease the pain and swelling of arthritis. It may prevent joint damage and reduce the risk of long-term disability. Hydroxychloroquine and sunlight How to stop diarrhea caused by hydroxychloroquine Can plaquenil cause a positive nicotine urine test Plaquenil Hydroxychloroquine sulfate is a drug originally used to prevent or treat malaria. Malaria is a serious but rare disease caused by bites from infected mosquitos. Now the drug is used to treat inflammatory diseases. This type of disease occurs when the body's immune system attacks its own healthy tissue. Read about hydroxychloroquine Plaquenil, a drug used to treat or prevent malaria, and to treat lupus and rheumatoid arthritis. Read more about the prescription drug hydroxychloroquine Plaquenil. MedicineNet Mar 04, 2020 Uses of Hydroxychloroquine or Plaquenil. Hydroxychloroquine or Plaquenil It is part of a series of medications that were originally used to prevent and treat malaria, but, at present, it is used for discomforts such as rheumatoid arthritis, some symptoms of lupus and other autoimmune diseases. It has also been used to prevent and treat malaria. Today, it is used to treat rheumatoid arthritis, some symptoms of lupus, childhood arthritis (or juvenile idiopathic arthritis) and other autoimmune diseases. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. Is plaquenil used to Plaquenil Uses, Dosage & Side Effects -, Hydroxychloroquine Plaquenil Side Effects & Dosage for. Neuropathy caused by plaquenil Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Hydroxychloroquine, the drug that could stop COVID-19. How effective is Plaquenil for Osteoarthritis by duration.. Plaquenil is also used to prevent and treat malaria. For this reason, it is sometimes classified as an antimalarial drug. For this reason, it is sometimes classified as an antimalarial drug. The exact way it works for this condition is unknown. Plaquenil is used to treat other types of infections too. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Today, Plaquenil and other antimalarials are also used to treat and help prevent symptoms caused by certain autoimmune diseases such as rheumatoid arthritis RA, systemic lupus erythematosus, and discoid lupus, even though these diseases are not caused by malaria parasites. Plaquenil belongs in a class of medications known as disease-modifying antirheumatic drugs DMARDs.