Most importantly, you help support continued development of this site. The majority of cases of retinotoxicity have occurred in patients that have had a cumulative dose exceeding 1000g of hydroxychloriquine (Plaquenil). This level is reached in about 7 years with the most common daily dose of Plaquenil, 400 mg/day (200 bid). Benefit of hydroxychloroquine Plaquenil and cancer risk Can you take tylenol with plaquenil The main outcomes were toxicity as determined by characteristic visual field loss or retinal thinning and photoreceptor damage. They also examined risk factors and prevalence. The study findings revealed that when hydroxychloroquine was used at doses 5mg /kg, the risk of retinopathy was 1% in the first 5 yrs. 2% in 10 yrs. 20 % after 20 yrs. Aug 29, 2014 Several risk factors may increase the likelihood of retinal toxicity from Plaquenil such as, age of greater than 60 years, daily dose more than 6.5 mg/kg; use of the drug more than 5 years, obesity, preexisting retinal disease and, renal or liver failure. Hydroxychloroquine retinal toxicity is far more common than previously considered; an overall prevalence of 7.5% was identified in patients taking HCQ for greater than 5 years, rising to almost 20. It now solely uses real body weight (rather than ideal body weight) based on new recommendations from a 2014 study (1). Disclaimer: This tool is designed to help eye care professionals better understand the risk the of retinotoxicity from hydroxychloroquine. Please note: This calculator was modified in 9/2015. Hydroxychloroquine retinal toxicity risk factors Risk of Retinal Toxicity in Longterm Users of., The Risk of Retinal Toxicity with Plaquenil - Sjogren's Chloroquine-urinaquineChloroquine in amoebiasis Hydroxychloroquine has a lower risk of ocular toxicity, both corneal and retinal, compared with chloroquine. Smoking possibly reduces the efficacy of hydroxychloroquine, although studies have not usually confirmed this clinical impression. Hydroxychloroquine is considered safer than chloroquine during pregnancy and lactation. Hydroxychloroquine DermNet NZ. Hydroxychloroquine retinopathy Eye. Dr. Noskow's Case Report Plaquenil Toxicity - Hollywood.. Risk factors that increase the chance of hydroxychloroquine retinopathy include daily dosage, cumulative dose, renal or liver disease, age, and previous retinal disease 9. A daily dose of 6.5mg/kg ideal body weight places patients at higher risk, but a daily dose below this level did not preclude the patient from developing toxicity after. Risk of Retinal Toxicity in Longterm Users of Hydroxychloroquine Ji-Won Kim, Yoon Young Kim, Hwajeong Lee, Sung-Hoon Park, Seong-Kyu Kim, and Jung-Yoon Choe ABSTRACT. Objective. Several studies have reported risk factors for hydroxychloroquine HCQ retinal toxicity, but data are limited for patients of Asian ancestry. Retinal toxicity from chloroquine CQ and its analogue, hydroxychloroquine HCQ, has been recognized for many years. The first reports concerned long-term use of CQ for malaria, and later reports showed retinopathy after treatment of anti-inflammatory diseases.1, 2 Chloroquine toxicity remains a problem in many parts of the world, but it is seen infrequently in the United States, where the.