Plaquenil is used to treat or prevent malaria, a disease caused by parasites that enter the body through the bite of a mosquito. Malaria is common in areas such as Africa, South America, and Southern Asia. Dayquil drug interactions hydroxychloroquine Chloroquine phosphate over the counter 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. Hydroxychloroquine is a derivative of chloroquine that has both antimalarial and antiinflammatory activities and is now most often used as an antirheumatologic agent in systemic lupus erythematosis and rheumatoid arthritis. Hydroxychloroquine therapy has not been associated with liver function abnormalities and is an extremely rare cause of clinically apparent acute liver injury. Hydroxychloroquine is also used to treat and prevent certain types of malaria. It may also be used for the treatment of lupus. This medication may be available under multiple brand names and/or in several different forms. Plaquenil is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. This medicine is not effective against all strains of malaria. Hydroxychloroquine uses Plaquenil hydroxychloroquine sulfate dosing, indications., Hydroxychloroquine - LiverTox - NCBI Bookshelf Hydroxychloroquine solubilityPlaquenil side effects when stopping Hydroxychloroquine is in a class of medications that was first 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. It is not clear why hydroxychloroquine is effective. Hydroxychloroquine Plaquenil. Plaquenil - Uses, Side Effects, Interactions -. Hydroxychloroquine Side-effects, uses, time to work. Hydroxychloroquine belongs to the family of medicines called “antimalarials” AMs, which are also classified as disease-modifying anti-rheumatic drugs, or DMARDs. These drugs were initially used to prevent and to treat malaria but are no longer used for those purposes; more effective drugs have since been developed. Hydroxychloroquine is used to prevent or treat malaria infections caused by mosquito bites. It does not work against certain types of malaria chloroquine-resistant. Hydroxychloroquine is in a class of drugs called antimalarials. It is used to prevent and treat acute attacks of malaria. It is also used to treat discoid or systemic lupus erythematosus and rheumatoid arthritis in patients whose symptoms have not improved with other treatments.