One such commonly used medication for dermatologic and rheumatologic inflammatory conditions is hydroxychloroquine (Plaquenil), a chloroquine derivative. It is used to treat many diseases including malaria, rheumatoid arthritis and systemic lupus erythematosus. What happens if you just stop taking plaquenil Plaquenil maculopathy symptoms Eye effects of plaquenil Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction Provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Data sources include IBM Watson Micromedex updated, Cerner Multum™ updated, Wolters Kluwer™ updated. New Guidelines on Hydroxychloroquine Dosage – Where Are We? Shriyanka Jain 1 and John Waterman 2, 1 Division of Rheumatology, University of Connecticut, School of Medicine, Farmington, CT, 2 Rheumatology, Connecticut VA Healthcare System, Newington, CT It is imperative that patients and physicians are aware of and watch for this drug’s ocular side effects. Retinal toxicity from hydroxychloroquine is rare, but even if the medication is discontinued, vision loss may be irreversible and may continue to progress. What is the highest doesagewith plaquenil Plaquenil Risk Calculators, Hydroxychloroquine Dosage Guide with Precautions - What does chloroquine treatWhat is plaquenil toxicity Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. Maximum dosage 400 mg per day. Child dosage. Hydroxychloroquine Side Effects, Dosage, Uses, and More. New Guidelines on Hydroxychloroquine Dosage - Where Are We.. Treating Lupus with Anti-Malarial Drugs Johns Hopkins.. Hydroxychloroquine HCQ, 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. 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. The recommended Plaquenil dosage for malaria prevention is 400 mg once weekly, starting two weeks before the anticipated exposure. The usual starting dosage for treating lupus is 400 mg once or twice a day, and the recommended starting dose for the treatment of rheumatoid arthritis is 400 to 600 mg daily.