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. Hydroxychloroquine and edema Plaquenil and dark spots Plaquenil side effects heartburn I'm on Plaquenil for leukocytoclastic vasculitis among other autoimmune problems. Is this why Plaquenil is thought to be effective in treating this? I keep hearing about the vascular problems with the virus and autoimmune drug intervention, but I'm confused about the intent behind the medicine. What is hydroxychloroquine Plaquenil, and how does it work mechanism of action? Hydroxychloroquine is classified as an anti-malarial drug. It is similar to chloroquine Aralen and is useful in treating several forms of malaria as well as lupus erythematosus and rheumatoid arthritis. Its mechanism of action is unknown. 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. 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. Does plaquenil Treating Lupus with Anti-Malarial Drugs Johns Hopkins Lupus., Hydroxychloroquine Plaquenil Side Effects & Dosage for. Hydroxychloroquine 200 mg does it have steroids in itChloroquine powderPlaquenil and astChloroquine histamineCan plaquenil be used to trear lichen plnas Side Effects. Drug information provided by IBM Micromedex Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Hydroxychloroquine Oral Route Side Effects - Mayo Clinic. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Hydroxychloroquine - Wikipedia. Hydroxychloroquine is used to prevent or treat malaria infections caused by mosquito bites. It does not work against certain types of malaria chloroquine-resistant. The United States Center for. According to the American College of Rheumatology, hydroxychloroquine Plaquenil, is a “disease-modifying anti-rheumatic drug DMARD,” meaning that it helps reduce the pain and swelling that come with arthritis. It can also reduce the incidence of joint damage, thus lessening the risk of developing a long-term disability from complications of RA. Plaquenil pla´kwĕ-nil trademark for a preparation of hydroxychloroquine, an antiinflammatory and antiprotozoal agent used for treatment of malaria, lupus erythematosus, rheumatoid arthritis, and giardiasis.