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. Plaquenil who takes it What happens when you stop taking plaquenil Hydroxychloroquine has largely replaced chloroquine in the United States, except among patients who travel to areas endemic with malaria. Although the mechanisms of the two agents are presumed to be the same, many reports suggest that chloroquine is more toxic to the retina than hydroxychloroquine. Plaquenil Hydroxychloroquine is used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus & others. Hydroxychloroquine is a 4-aminoquinoline and used primarily as an antimalarial drug. The approved drug is a racemic mixture and we show the chemical structure without stereochemistry to represent the mixture. 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 structure Hydroxychloroquine sulfate ≥98% HPLC, powder Sigma-Aldrich, Plaquenil Hydroxychloroquine - Side Effects, Dosage. Chloroquine lc3-iiPlaquenil toxicity after stopping Rheumatoid Arthritis. The action of hydroxychloroquine is cumulative and may require weeks to months to achieve the maximum therapeutic effect see CLINICAL PHARMACOLOGY. Initial adult dosage 400 mg to 600 mg 310 to 465 mg base daily, administered as a single daily dose or in two divided doses. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Hydroxychloroquine Ligand page IUPHAR/BPS Guide to.. Recommendations on Screening for Chloroquine and.. PLAQUENIL hydroxychloroquine sulfate tablets is indicated for the treatment of rheumatoid arthritis, and discoid and systemic lupus erythematosus, in patients who have not responded satisfactorily to drugs with less potential for serious side effects. Hydroxychloroquine HCQ is an anti-malarial medication that has in recent times been utilized as treatment for a variety of autoimmune diseases, such as rheumatoid arthritis and systemic lupus erythematosus, and other inflammatory and dermatologic conditions. Hydroxychloroquine Sulfate is a synthetic derivative of quinolyl with chemotherapeutic and antibiotic properties, Hydroxychloroquine Sulfate acts against erythrocytic malarial parasites Plasmodium vivax, ovale, and malariae by concentrating in food vacuoles. It inhibits plasmodial heme polymerase and acts through other unknown mechanisms.