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 classification What is the difference between plaquenil and hydroxychloroquine Chloroquine allergy Plaquenil toxicity is typically asymptomatic in early stages, but over time can lead to severe vision loss and retinal damage. The risk of retinal toxicity was initially believed to be less than 1%. Plaquenil hydroxychloroquine is in a class of drugs called disease-modifying anti-rheumatic drugs, which are used to decrease inflammation, pain and joint damage. While today it is used to treat autoimmune conditions, such as rheumatoid arthritis and lupus, it was originally used as an anti-malaria drug. It is a derivative chloroquine, also an antimalarial agent which has a much higher risk of toxicity. Plaquenil can rarely cause a retinal problem involving the central visual area, or macula. Retinal toxicity from Plaquenil is rare, but even if the medication is discontinued, vision loss may be irreversible and may continue to progress. 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. Plaquenil and double vision Protecting your eyesight when taking Plaquenil Lupus., Plaquenil Side Effects on Your Eyes and Vision Plaquenil and dark spotsPlaquenil and lower back painWhat is side effects of plaquenilPlaquenil dosage according to weight 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.. Medications that can Affect the Eye or Visual System. Ocular side effects of anti-rheumatic medications what a.. Oct 22, 2019 The risk may also be higher with some doses of Plaquenil hydroxychloroquine, if you use Plaquenil hydroxychloroquine for longer than 5 years, or if you take certain other drugs like tamoxifen. Call your doctor right away if you have any eyesight changes like blurred or foggy eyesight, trouble focusing or reading, or trouble seeing in dim light. When allowed to advance, hydroxychloroquine retinal toxicity leads to loss of up to three visual functions acuity, peripheral vision and night vision. Signs. On examination, a telltale sign of hydroxychloroquine toxicity is a bilateral change in the retinal pigment epithelium of the macula that gives the commonly described appearance of a bull. Plaquenil, widely used to treat lupus, rheumatoid arthritis and other inflammatory and dermatologic conditions, is very effective, and “the risk of toxicity in the first five years for someone without special risk factors is very low,” Dr. Marmor said. However, risk increases with duration of use.