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. How does plaquenil work for rheumatoid arthritis Buy aralen lupus Long-term progression of hydroxychloroquine retinopathy off the drug 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. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. What is the most important information I should know about hydroxychloroquine Plaquenil, Plaquenil Sulfate, Quineprox? Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. 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. Plaquenil knee side effects Long-Term Side Effects of Plaquenil for Rheumatoid Arthritis., Plaquenil Hydroxychloroquine Side effects, Images, Uses. Best pricing hydroxychloroquine online prescriptionReactions to plaquenil Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Plaquenil Side Effects - GoodRx. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Hydroxychloroquine Plaquenil Side Effects & Dosage for Malaria. Common side effects linked to Plaquenil include nausea and diarrhea. Taking the medication with food eases nausea for most people taking the drug. Less common side effects include skin rashes, hair thinning, and weakness. I have been on Plaquenil for about 15 years without apparent side effects until this year. But this year I have developed severe swelling of the face and red rash on the upper half of my face. This also includes very difficult itching in odd places on my body, my eyebrows and eyelashes, my earlobes, my lower legs and lower arms, my scalp and. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.