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. Allergy reaction to plaquenil Symptoms of allergic reaction to plaquenil Chloroquine sulphate chronic discoid lupus erythematosus Take Plaquenil EXACTLY as prescribed by your physician. Do not stop taking the medication without first speaking to your doctor. Taking Hydroxychloroquine with food and/or milk can help prevent stomach upset. If you miss a dose, take it as soon as you remember. Since the side effect of vision loss is possible but rare, it is important for you to tell your doctor about any vision changes that you experience. Doctors generally recommend regular eye exams while on Plaquenil, so that early changes can be caught. Once abnormalities are discovered, toxicity has already occurred. If you are taking cimetidine. If you are taking any drugs that can cause a certain type of heartbeat that is not normal prolonged QT interval. There are many drugs that can do this. Ask your doctor or pharmacist if you are not sure. This is not a list of all drugs or health problems that interact with Plaquenil hydroxychloroquine. Plaquenil is used to treat other types of infections too. Malaria is spread by mosquitoes, which transmit the parasites that cause the infection, usually in tropical and subtropical parts of the world. Does plaquenil cause dizziness the longer you take it Study Raises Questions about Sjogren's and Plaquenil, Taking Plaquenil for Rheumatoid Arthritis Aralens phosphate I recently decided to stop taking Plaquenil because I was having constant chest pains even more so than I usually have due to Lupus. Since I have not taken it my chest feels so much better which is odd because chest pain is not listed as a side effect. Also I noticed that the Plaquenil I think was making me feel different but not in a good way. Had to stop taking Plaquenil -. Plaquenil Indications, Side Effects, Warnings -. Will you have Dizziness with Plaquenil - eHealthMe. Jun 30, 2015 Plaquenil can cause blurred vision and dizziness. Do not drive or operate heavy machinery until you know how Plaquenil affects you. Do not take Plaquenil if you are allergic to Plaquenil or to any of its ingredients; pre-existing retinopathy of the eye If you are taking Plaquenil to treat an inflammatory condition or malaria, you should be aware of the side effects that may occur to your eyes and vision. Plaquenil hydroxychloroquine is in a class of drugs called disease-modifying anti-rheumatic drugs, which are used to decrease inflammation, pain and joint damage. Find information about common, infrequent and rare side effects of Plaquenil Oral.