One such commonly used medication for dermatologic and rheumatologic inflammatory conditions is hydroxychloroquine (Plaquenil), a chloroquine derivative. It is used to treat many diseases including malaria, rheumatoid arthritis and systemic lupus erythematosus. Chloroquine for dogs Hydroxychloroquine dose in sle Plaquenil oct image Hydroxychloroquine 200 mg for lupus Apr 20, 2011 Although the incidence of macular toxicity is infrequent with Plaquenil use at a dosage of 200mg or 400mg q.d. its visual impact can be devastating. 2,3. The associated classic retinal toxicity is described as a bull’s eye maculopathy ring of depigmented retinal pigment epithelium that spares the foveal area. Recommendations on Screening for Chloroquine and Hydroxychloroquine Retinopathy Retinal toxicity from chloroquine CQ and its analogue, hydroxychloroquine HCQ, has been recognized for many years. Chloroquine toxicity remains a problem in many parts of the world, but is seen less frequently in the United States where the drug largely has been replaced by HCQ. I am lucky as a rheumatologist in practice for more than 30 years to have only had one malpractice lawsuit. But it was for alleged Plaquenil related eye toxicity, and believe me, attornies will grab any guideline they can as "Standard-of-Care" if it suits their case. All to say, we treat patients, not guidelines, but we all need to aware of these. It is imperative that patients and physicians are aware of and watch for this drug’s ocular side effects. Retinal toxicity from hydroxychloroquine is rare, but even if the medication is discontinued, vision loss may be irreversible and may continue to progress. Plaquenil toxicity guideline Despite Plaquenil dosing recommendations, retinal toxicity., Recommendations on Screening for Chloroquine and. Chloroquine phosphate pronounceGeneric.plaquenil watson 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. My Take on New Ocular Screening Guidelines for Plaquenil.. My Take on New Ocular Screening Guidelines for. AMERICAN COLLEGE OF RHEUMATOLOGY. Mar 02, 2018 The new guideline also makes recommendations regarding the techniques and timing of baseline and follow-up screening tests for both hydroxychloroquine and chloroquine retinopathy. Hydroxychloroquine is a medicine that is effective in treating various long-term inflammatory disorders of the joints and skin. 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. Although it is considered rare, retinal toxicity from the intake of Plaquenil can be irreversible even if the drug is discontinued 2, 3. What is Plaquenil Toxicity? The toxicity resulting from the intake of Plaquenil is due to its affinity for melanin-containing structures in the body.