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. Plaquenil side effects skin rash What is chloroquine mode of action Plaquenil and pain relief Disease EntityDiagnosisManagementAdditional ResourcesReferences Chloroquine, can be fatal. Medication should be stored in childproof containers out of the reach of infants and children. How long is it safe to use chloroquine? CDC has no limits on the use of chloroquine for the prevention of malaria. When chloroquine. is used at higher doses for many years, a rare eye condition called retinopathy has occurred. It has been detected in the plasma, red blood cells, and urine of patients 5 years after their last known ingestion. 27 This prolonged presence may account for the rare cases of delayed onset of chloroquine retinopathy seen up to 7 years or longer after discontinuation. 28, 29. The precise mechanism of chloroquine-mediated retinal toxicity is. 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. Chloroquine retinopathy mechanism Chloroquine and hydroxychloroquine – Knowledge for medical., Medicines for the Prevention of Malaria While Traveling - Chloroquine. Chloroquine drug name Apr 02, 2019 Mechanism of Action. Chloroquine is an antimalarial agent. While the drug can inhibit certain enzymes, its effect is believed to result, at least in part, from its interaction with DNA. However, the mechanism of plasmodicidal action of chloroquine is not completely certain. Activity in vitro and in vivo Aralen Chloroquine Uses, Dosage, Side Effects.. Chloroquine Retinopathy - an overview ScienceDirect Topics. Effects of chloroquine on viral infections an old drug.. The mechanism of action of these drugs remains uncertain but includes effects on the function of lysosomes and components of the immune system. 1,2. It was hoped that the chemical modification of chloroquine to hydroxychloroquine would abrogate its retinal toxicity. Chloroquine and its derivative, hydroxychloroquine sulfate, which have been useful in treating malaria and in larger doses, collagen-vascular disease, cause a cumulative dose-related pigmentary retinopathy. Mechanism. Inhibition of critical enzymes & interference with the metabolic functions of retinal pigment epithelium RPE & photoreceptors. Chloroquine is a potent drug used for the treatment of various diseases, including malaria and a range of connective tissue disorders. Chloroquine retinopathy is an important complication that may appear even years after cessation of the drug, presenting with impaired visual acuity, central vision loss and progressive damage that could result in irreversible blindness. A detailed patient.