This eye toxicity limits long-term use of the drugs. The risk of toxicity is low for individuals without complicating conditions during the first 5 years of treatment using less than 6.5 mg/kg/day of hydroxychloroquine or 3 mg/kg/day of chloroquine, and/or cumulative doses of less than 1000 gram and 460 gram (total dose), respectively. Plaquenil bleeding Primaquine chloroquine interaction The risk of toxicity due to chloroquine and hydroxychloroquine is proportional to the medication dose and duration of treatment. Patients who are on higher doses of the medication for longer periods of time are at greater risk of toxicity. In 2011, the American Academy of Ophthalmology AAO published revised screening guidelines. Aralen chloroquine is an antimalarial drug used for the treatment of malaria and extraintestinal amebiasis. Common side effects are reduced hearing, tinnitus, nausea, vomiting, and diarrhea. Dosage, drug interactions, and pregnancy and breastfeeding safety are provided. Retina Manifestations of Chloroquine and Hydroxychloroquine Toxicity. The classical definition of chloroquine toxicity is characterized by bilateral pigmentary change of the macula usually sparing the fovea. This has come to be known as bull’s-eye maculopathy. The retinal periphery may also be involved but infrequently. The earliest signs of toxicity include bilateral paracentral visual field changes (best detected with a red test object) and a subtle granular depigmentation of the paracentral RPE. Some physicians suggest that lean body weight is more accurate when calculating daily dosage. Chloroquine toxicity dose Chloroquine and Hydroxychloroquine Toxicity Treatment., Aralen chloroquine Malaria Drug Side Effects & Dosage Chloroquine life cycle Chloroquine retinopathy, is a form of toxic retinopathy damage of the retina caused by the drugs chloroquine or hydroxychloroquine, which are sometimes used in the treatment of autoimmune disorders such as rheumatoid arthritis and systemic lupus erythematosus. This eye toxicity limits long-term use of the drugs. Chloroquine retinopathy - Wikipedia. Hydroxchloroquine and Chloroquine Toxicity. Chloroquine MedlinePlus Drug Information. Who should not take chloroquine? People with psoriasis should not take chloroquine. How should I take chloroquine? Both adults and children should take one dose of chloroquine per week starting at least 1 week before. traveling to the area where malaria transmission occurs. They should take one dose per week while Chloroquine comes as a tablet, liquid, or injection. Your dose will depend on your medical condition, age, weight, and response to treatment. You can take this medicine with food if it causes an. Ocular toxicity is unlikely if the dose of chloroquine phosphate does not exceed 4 mg/kg daily equivalent to chloroquine base approx. 2.5 mg/kg daily. Cautions. Acute porphyrias;. Hydroxychloroquine and Chloroquine Retinopathy Recommendations on Screening 2018. Chloroquine appears to be more retinotoxic than hydroxychloroquine.