It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Hydroxychloroquine in diabetes Plaquenil breastfeeding hale Tell your doctor if any of the following side effects, as they may be indications of a more serious reaction Headache. Loss of appetite. Dizziness. Nausea. Diarrhea, vomiting, or stomach pain. Skin rash. Plaquenil. Uses. Hydroxychloroquine is used to prevent or treat malaria infections caused by mosquito bites. It does not work against certain types of. Side Effects. Precautions. Interactions. Chloroquine has been replaced with hydroxychloroquine as it has less side effects. Eye Exam Before Starting Treatment. If a person is going to be treated long-term with Plaquenil, they need to have a thorough dilated eye exam with best corrected visual acuity, central visual field, color vision, and dilated examination of the retina. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. Plaquenil dangers Plaquenil Side Effects on Your Eyes and Vision, Plaquenil Oral Uses, Side Effects, Interactions. Who owns plaquenil Aug 14, 2017 Plaquenil is the brand name of hydroxychloroquine, a drug used to prevent or treat malaria. Plaquenil is also used for long-term treatment of autoimmune diseases such as rheumatoid arthritis RA and systemic lupus erythmatosis. Long-Term Side Effects of Plaquenil for Rheumatoid Arthritis.. Plaquenil Hydroxychloroquine Side Effects and Adverse Reactions. HYDROXYCHLOROQUINE - ORAL Plaquenil side effects, medical.. Any of the following, especially combined, could point to nephritis. Foamy Urine- Blood in the Urine- Pain in Your Mid-back or ‘Flank’. Swelling- Usually in the legs, feet, or ankles edema. Dark Urine. High Blood Pressure. Changes in Frequency of Urination. Vomiting. Water Retention/. 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. Plaquenil is the brand name of hydroxychloroquine, a drug used to prevent or treat malaria. Plaquenil is also used for long-term treatment of autoimmune diseases such as rheumatoid arthritis RA and systemic lupus erythmatosis.