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. White oval pill plaquenil Can i take turmeric with plaquenil Valtrex and plaquenil Hydroxychloroquine is a well tolerated medication for various rheumatologic and dermatologic conditions. Its main side effects are gastrointestinal upset, skin rash, headache, and ocular toxicity. Within the eye, hydroxychloroquine negatively impacts the cornea, ciliary body, and retina. After seeing MANY professionals including a neurologist, a retinal specialist, neuro-ophthalmologist, and undergoing MANY different tests, she was diagnosed with Plaquenil toxicity. She does have field of vision loss, mostly on things that are close up. She took Plaquenil for almost five years before having any symptoms. Hydroxychloroquine may cause a condition that affects the heart rhythm QT prolongation. QT prolongation can rarely cause serious rarely fatal fast/irregular heartbeat and other symptoms such. 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. Symptoms of hydroxychloroquine toxicity Hydroxychloroquine Side Effects, Dosage, Uses, and More, Has anyone experienced plaquenil toxicity with damage to eyes? Effects of stopping hydroxychloroquineChloroquine phosphate dosage malaria The characteristics of patients which may increase of developing toxicity symptoms while taking Plaquenil include an age of more than 60 years old, having renal or hepatic insufficiency or any existing macular degeneration and retinal disease 1. Plaquenil Toxicity - Symptoms, Treatment, Risk Factors.. Hydroxychloroquine Oral Uses, Side Effects, Interactions.. Plaquenil - FDA prescribing information, side effects and uses. Common, nonocular, side effects of chloroquine and hydroxychloroquine include pruritus, headaches, dizziness, and gastrointestinal upset. Less frequent side effects include discoloration of the oral cavity, nails, skin and hair and rash. Death is usually within 1 to 3 hours of ingestion and the cause is cardiac arrest. Drowsiness, dizziness, and visual disturbances can progress quickly to seizures, apnea, arrhythmias, and hypotension. Cardiotoxicity occurs in greater than 50% of cases. Hypotension from vasodilation and decreased cardiac output is frequently seen. 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.