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. Plaquenil optometry exam Hydroxychloroquine sulfate teir Feb 19, 2020 Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Stop taking hydroxychloroquine and call your doctor at once if you have trouble focusing, if you see light streaks or flashes in your vision, or if you notice any swelling or color changes in your eyes. Because it's a long-term treatment it's important to keep taking hydroxychloroquine unless you have severe side-effects even if it doesn't seem to be working at first. even when your symptoms improve to help keep the disease under control. One PLAQUENIL tablet contains 200 mg of hydroxychloroquine sulfate, which is equivalent to 155 mg base. Take PLAQUENIL with a meal or a glass of milk. Malaria Prophylaxis. Adults. 400 mg 310 mg base once weekly on the same day of each week starting 2 weeks prior to exposure, and continued for 4 weeks after leaving the endemic area. 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. Taking hydroxychloroquine Hydroxychloroquine Reviews & Ratings at, Hydroxychloroquine Side-effects, uses, time to work Plaquenil and maculopathyPlaquenil anxiety Safety and efficacy of hydroxychloroquine to treat lupus and arthritis have not been established in children. Geriatric. Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of hydroxychloroquine in the elderly. Hydroxychloroquine Oral Route Before Using - Mayo Clinic. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. Hydroxychloroquine may react with other. medicines. Tell your doctor, nurse or pharmacist if you are taking any other medicines, including those bought in the supermarket and any supplements or natural health products. Your doctor or pharmacist will check if the products are OK to take with hydroxychloroquine. For patients taking hydroxychloroquine to prevent malaria Your doctor may want you to start taking this medicine 1 to 2 weeks before you travel to an area where there is a chance of getting malaria. This will help you to see how you react to the medicine. 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.