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. What does plaquenil do for sjogrens Hydroxychloroquine 50 mg Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. Hydroxychloroquine typically is very well tolerated. Serious side effects are rare. The most common side effects are nausea and diarrhea, which often improve with time. Less common side effects include rash, changes in skin pigment such as darkening or dark spots, hair changes, and muscle weakness. Tell your doctor if you have any side effect that bothers you or does not go away. These are not all the possible side effects Plaquenil. For more information, ask your doctor or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. 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. What are the most common side effects of plaquenil Plaquenil Hydroxychloroquine Side effects, Images, Uses., Hydroxychloroquine Plaquenil Plaquenil and weightTylenol and plaquenilHydroxychloroquine malaria prophylaxis dose The most common symptoms of this side effect are difficulty reading or seeing words, letters, or parts of objects may be missing or blurred vision. The changes are reversible if this is detected early. How to minimize the side-effects of Plaquenil Patients should get their eyes checked by an eye doctor every year. Plaquenil – RheumInfo. Plaquenil - Side Effects, Uses, Dosage, Overdose, Pregnancy, Alcohol.. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Find user ratings and reviews for Plaquenil oral on WebMD including side effects and drug interactions, medication effectiveness, ease of use and satisfaction Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. 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 This means that the side effects of Plaquenil are mild and infrequent compared with its potential benefits. As with any medication, allergic reactions including skin rashes and non-allergic reactions can occur. The side effect that is of greatest concern is retinal toxicity.