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. Plaquenil treats celiac Plaquenil help pleurisy Plaquenil is the brand name for the prescription drug hydroxychloroquine. 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. PLAQUENIL can lower the convulsive threshold. Co-administration of PLAQUENIL with other antimalarials known to lower the convulsion threshold e.g. mefloquine may increase the risk of convulsions. Antiepileptics. The activity of antiepileptic drugs might be impaired if co-administered with PLAQUENIL. Methotrexate Hydroxychloroquine is in a class of drugs called antimalarials. It is used to prevent and treat acute attacks of malaria. It is also used to treat discoid or systemic lupus erythematosus and rheumatoid arthritis in patients whose symptoms have not improved with other treatments. 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. Antimalarials hydroxychloroquine Hydroxychloroquine Oral Route Description and Brand Names., Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects. Alternativesto taking plaquenilHydroxychloroquine pregnancy classPlaquenil photosensitivity rash 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. Plaquenil Side Effects Common, Severe, Long Term -. Hydroxychloroquine MedlinePlus Drug Information. Hydroxychloroquine and Antimalarials The Journal of.. Covers antimalarial drugs for rheumatoid arthritis. Lists generic and brand names such as hydroxychloroquine sulfate Plaquenil. Includes side effects, and gives a warning for women who are breast-feeding, pregnant, or thinking about becoming pregnant. Chloroquine and hydroxychloroquine have not been given a formal green light in the US to fight the pandemic, but the Food and Drug Administration FDA said it would work with domestic makers to. Hydroxychloroquine is a prescription drug. It comes as an oral tablet. Hydroxychloroquine is available as the brand-name drug Plaquenil. It’s also available in a generic version.