Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Off label uses of plaquenil Hydroxychloroquine and the flu Flying saucer sign plaquenil Is hydroxychloroquine used for fibromyalgia Check with your doctor immediately if any of the following side effects occur Incidence not known. Blistering, peeling, loosening of the skin blurred vision or other vision changes chest discomfort, pain, or tightness cough or hoarseness dark urine decreased urination defective color vision diarrhea difficulty breathing Hydroxychloroquine Side Effects. Get emergency medical help if you have signs of an allergic reaction. Hydroxychloroquine 200 mg-TEV, white, oblong. Hydroxychloroquine 200 mg-WAT, white, oval. Common side effects may include headache, dizziness, ringing in your ears; nausea, vomiting, stomach pain; loss of appetite, weight loss; mood changes, feeling nervous or irritable; skin rash or itching; or. hair loss. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Side effects of plaquenil 400 mg Plaquenil - Uses, Side Effects, Interactions -, Hydroxychloroquine - Side Effects, Dosage, Interactions. Chloroquine tablets indiaUsing plaquenil in end stage macular degenerationPlaquenil et depressionHydroxychloroquine pneumococcal vaccineChloroquine phosphate fish treatment 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 - FDA prescribing information, side effects and uses. Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Plaquenil hydroxychloroquine sulfate dose, indications.. Get medical help right away if you have any very serious side effects, including sensitivity to light, vision changes e.g. blurred vision, seeing light flashes/streaks/halos, missing/blacked-out areas of vision, muscle weakness, numbness/tingling/pain of the arms/legs. Note This document contains side effect information about hydroxychloroquine. Some of the dosage forms listed on this page may not apply to the brand name Plaquenil. For the Consumer. Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. Common Side Effects of Plaquenil. Tell your doctor if any of the following side effects, as they may be indications of a more serious reaction. Hydroxychloroquine 200 mg-INV, white, oblong.