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 patient assistance canada Plaquenil liver kidney toxicity Note This document contains side effect information about hydroxychloroquine. 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. Toxicity from hydroxychloroquine may be seen in two distinct areas of the eye the cornea and the macula. The cornea may become affected relatively commonly by an innocuous cornea verticillata or vortex keratopathy and is characterized by whorl-like corneal epithelial deposits. While side effects of corticosteroids are usually to blame, there is also the possibility of ocular damage associated with long-term use of the antimalarial drugs hydroxychloroquine brand name Plaquenil® and chloroquine. 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. Hydroxychloroquine toxicity Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Hydroxychloroquine - Wikipedia Plaquenil manufacturer Hydroxychloroquine can cause serious vision problems. If you experience any changes in vision, stop taking hydroxychloroquine and call your doctor immediately. Hydroxychloroquine MedlinePlus Drug Information. Protecting your eyesight when taking Plaquenil Lupus.. Early Plaquenil Toxicity Detected without Bull’s Eye.. Hydroxychloroquine is used to treat malaria. It is also used to prevent malaria infection in areas or regions where it is known that other medicines eg, chloroquine may not work. Hydroxychloroquine belongs to a group of medicines known as antimalarials. Factors associated with hydroxychloroquine toxicity include the following Maintenance dose greater than 5 mg/kg/d based on real weight most critical risk Daily dose greater than 400 mg Hydroxychloroquine is usually taken with food or milk to prevent stomach upset. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage is also based on weight.