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. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Are you more likely to get sick while taking plaquenil Optometric testing for plaquenil toxicity Chloroquine phosphate powder lethal Hydroxychloroquine will it help ringworm Plaquenil and your eyes. A rare side effect of Plaquenil is damage to the eye's retina. The retina is the light-sensitive tissue at the back of the eye. Using Plaquenil for a long period of time may harm the retina, causing serious vision loss. People with retinal damage from Plaquenil are not aware at first that they are losing vision. I have RA and Plaquenil just got added to NSAID, MTX, and Prednisone. I am taking 400mg of Plaquenil, 20mg MTX, and 10mg Prednisone. I have only taken the Plaquenil for four days and every day I have a headache. It is not like a regular headache. It feels like someone has their hands on top of my head and pushing down on my head. Like I have pressure on the top of my head. I nver had this. Plaquenil can cause serious side effects when used in high doses for chronic diseases such as RA over the long term. The New Zealand Dermatological Society recommends that to decrease the risk of retina damage, no more than 200mg of Plaquenil should be taken a day, and a dose of 400mg per day should be taken no longer than a few weeks. For example, it may be combined with an antibiotic to treat chronic Q-fever, which humans usually catch from farm animals or raw milk. Plaquenil is used to treat other types of infections too. What is side effects of plaquenil Hydroxychloroquine - Wikipedia, Plaquenil Side Effects • Johns Hopkins Arthritis Center Plaquenil arthritis treatmentChloroquine lysosomal inhibitor sigmaHydroxychloroquine and methotrexate Plaquenil is the brand name of hydroxychloroquine, a drug used to prevent or treat malaria. Plaquenil can cause serious side effects when used in high doses for chronic diseases such as RA over the long term. Long-Term Side Effects of Plaquenil for Rheumatoid.. Long-Term Side Effects of Plaquenil for Rheumatoid Arthritis.. Protecting your eyesight when taking Plaquenil Lupus.. 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. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about. Side effects include irritability, headache, weakness, hair lightening or loss, stomach upset, nausea, dizziness, muscle pain, rash and itching. Rarely, hydroxychloroquine can affect the bone marrow leading to reduced white blood cells leukopenia or platelets thrombocytopenia and abnormal red blood cells but potentially serious eye toxicity can occur. 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.