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. Plaquenil financial assistance Chloroquine injection intravenous What class of drug is chloroquine Plaquenil Warnings. Take with food. Take this medication at least 4 hours before or 4 hours after antacids. Avoid prolonged or excessive exposure to direct and/or artificial sunlight while using this medication. WARNING Keep Out of the Reach of Children. Fatal Poisoning may occur if chewed or swallowed. 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. Plaquenil can damage the retina of the eye, which can lead to blindness. This eMedTV page lists other side effects or complications that may occur with Plaquenil. Warnings and precautions on who should not use this drug are also listed on this page. 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. Drug warnings for plaquenil Plaquenil Hydroxychloroquine Side effects, Images, Uses., Plaquenil Side Effects on Your Eyes and Vision Herpes and plaquenil The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is. Common and Rare Side Effects for Plaquenil Oral. Plaquenil Warnings and Precautions - Antibiotics Home Page. PLAQUENIL hydroxychloroquine sulfate Label. Do not share your drugs with others and do not take anyone else's drugs. Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Plaquenil hydroxychloroquine, please talk with your doctor, nurse, pharmacist, or other health care provider. 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. Plaquenil Hydroxychloroquine may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources.