Pattern of Retinopathy: Although the locus of toxic damage is parafoveal in many eyes, Asian patients often show an extramacular pattern of damage. Dose: We recommend a maximum daily HCQ use of 5.0 mg/kg real weight, which correlates better with risk than ideal weight. Chloroquine glycosylation Hydroxychloroquine sulphate mechanism of action Interactions with plaquenil and fluconazole Chloroquine 750 mg Apr 20, 2011 Toxic maculopathy associated with chloroquine use was first documented in the literature five decades ago.1 In the United States, Plaquenil––an analog to chloroquine––is used to treat a variety of conditions, including rheumatoid arthritis, lupus and several distinct inflammatory disorders. Severe retinopathy, especially in the central area called the macula, causes significant, irreversible sight loss. For this reason the NHS now offers patients taking hydroxychloroquine regular eye health checks to screen them for signs of retinopathy. Screening for hydroxychloroquine retinopathy The aim of screening is not to prevent retinopathy Mar 15, 2019 Chloroquine and hydroxychloroquine belong to the quinolone family. They are related drugs with similar clinical indications for use and similar manifestations of retinal toxicity, although their therapeutic and toxic doses differ. Risk of Toxicity: The risk of toxicity is dependent on daily dose and duration of use. There are no similar demographic data for CQ, but dose comparisons in older literature suggest using 2.3 mg/kg real weight. Plaquenil maculopathy management Early Plaquenil Toxicity Detected without Bull’s Eye Maculopathy, Eye screening for patients taking hydroxychloroquine Plaquenil Plaquenil and the sunChloroquine 250 mg doseChloroquine drug cardPlaquenil make toungue Hydroxychloroquine retinopathy. It is the prescribing doctor’s responsibility to ensure their patients are adequately screened and to act on the results of screening. Hydroxychloroquine and Chloroquine Retinopathy.. Chloroquine and Hydroxychloroquine Toxicity Treatment.. Retinal Physician - Hydroxychloroquine Maculopathy An Update.. Background The American Academy of Ophthalmology recommendations on screening for chloroquine CQ and hydroxychloroquine HCQ retinopathy are revised in light of new information about the prevalence of toxicity, risk factors, fundus distribution, and effectiveness of screening tools. May 16, 2011 Hydroxychloroquine Plaquenil; HCQ has been an important and effective drug for the treatment of lupus erythematosus and related autoimmune and inflammatory diseases for half a century, although its potential to cause retinal damage continues to raise concern among rheumatologists and ophthalmologists. Plaquenil has replaced chloroquine because it produces less retinal side effects. Aside from its initial intended use, it has been also used for the management of rheumatoid arthritis, systemic lupus erythematosus and several other connective tissue disorders 1. Although it is considered rare.