Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Chloroquine dose in rheumatoid arthritis Plaquenil side effects weight Hydroxychloroquine is a CYP2D6 inhibitor, while cobicistat is a substrate of CYP2D6. Dasatinib Major Avoid coadministration of hydroxychloroquine and dasatinib. Hydroxychloroquine increases the QT interval and should not be administered with other drugs known to prolong the QT interval. 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 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. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Hydroxychloroquin sulphate Plaquenil, Plaquenil Sulfate, Quineprox hydroxychloroquine., Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses Chloroquine use in slePlaquenil and reduced renal functionMethotrexate and plaquenil side effectsChloroquine phosphate injection bpPlaquenil sun allergy Definition of hydroxychloroquine sulfate in the Medical Dictionary by The Free Dictionary Hydroxychloroquine sulfate definition of hydroxychloroquine.. Hydroxychloroquine - Wikipedia. Hydroxychloroquine C18H26ClN3O - PubChem. 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. How to use Hydroxychloroquine SULFATE. Hydroxychloroquine is usually taken with food or milk to prevent stomach upset. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage is also based on weight. Hydroxychloroquine Plaquenil is a drug that is classified as an anti-malarial drug. Plaquenil is prescribed for the treatment or prevention of malaria. It is also prescribed for the treatment of rheumatoid arthritis, lupus, and the side effects of lupus such as hair loss, joint pain, and more.