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. Side effects of stopping hydroxychloroquine Autoimmune plaquenil Plaquenil toxicity signs and symptoms Plaquenil for autoimmune disorders Hydroxychloroquine Plaquenil is a drug that is classified as an anti-malarial drug. Plaquenil is prescribed for the treatment or prevention of malaria. It is also prescribed for the treatment of rheumatoid arthritis, lupus, and the side effects of lupus such as hair loss, joint pain, and more. Hi, Dizzyness, lightheaded, & balance issues can also be caused by lupus alone. Even if your mri comes back normal, the cause can still be from the lupus. The plaquenil may be adding to your dizzyness, but as the others said, you may want to split up the dose and possible you are on too high a dose. Hydroxychloroquine Plaquenil is used to treat malaria, lupus, and rheumatoid arthritis. Learn about side effects, warnings, dosage, and more. For people with liver problems or alcohol misuse 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. Cognative issues plaquenil Rheumatoid Arthritis May Be Impacting Your Brain Fog., Plaquenil and dizziness DailyStrength Generic plaquenil manufacturersHydroxychloroquine dileSd oct plaquenilWoman in grey hydroxychloroquine-induced hyperpigmentation When you’re in pain, it’s very, very hard to concentrate. If you can’t concentrate, you can’t remember. This does not diminish the significance of problems with cognitive symptoms, but it does mean that you have to take care of all symptoms of your disease to address the cognitive ones, as well.” Coping with the cognitive symptoms of lupus Lupus.. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. I am new to this connective tissue disease. I have been put on Plaquenil twice a day and Mobic one time a day. I am understanding this Plaquenil can cause you to go blind after a period of time. All I know is the pain is excruciating at times and I am very lethargic and hurt constantly. 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 unwanted effects. Although not all of these side effects may occur, if they do occur. 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.