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. Hydroxychloroquine sulfate for lupus time usage Eye side effects of plaquenil Plaquenil derived from Hydroxychloroquine can cause weakening of the heart muscle, resulting in heart your healthcare provider right away if you have some or all of the following symptoms of heart failure. breathlessness 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. Here are side effect From taking too many antacids. The least important side effects are constipation or diarrhea. Large amounts of calcium carbonate -containing antacids can affect the balances of calcium and acid in the body and damage the kidneys. 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 happens if you take too much hydroxychloroquine Hydroxychloroquine Indications, Side Effects, Warnings -, RA and Hydroxychloroquine How Effective is it for Rheumatoid. Taking plaquenil for infertilityHydroxychloroquine tablet brand name 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 Hydroxychloroquine - Side Effects, Dosage.. What happens if you take too many antiacid tablets - Answers.. The Risk of Retinal Toxicity with Plaquenil. Plaquenil ® hydroxychloroquine sulfate is a prescription anti-malarial medicine. It is possible to take too much of this medication. The specific effects of a Plaquenil overdose can be quite dangerous and will vary depending on a number of factors, including the Plaquenil dosage and whether it was taken with any other medications or substances. People who take too much quinine may have overdose symptoms that could include Headaches. Nausea and vomiting. Abdominal stomach pain. Diarrhea. Drowsiness. Incoordination. Breathing problems. I have a question for anyone taking Plaquenil Hydroxychloroquine. I have been taking it for 7 months now. I just started going to the pool this summer, and every time I do I tan more than I ever have in my life. Even my toes. Each time I am only out in the sun for about 1 1/2 hrs.