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. What is plaquenil made of Plaquenil package insert How do you spell plaquenil Hydroxychloroquine – which has a similar toxicity profile – has largely superseded it for the treatment of rheumatoid arthritis. In overdose both chloroquine and hydroxychloroquine cause sodium channel blockade with primarily cardiovascular and central nervous system effects, as well as hypokalemia due to intracellular potassium shifts. Abstract Hydroxychloroquine poisoning has rarely been reported in the literature, with only 18 cases being found on searching the literature. In this paper, we report a case that occurred in Hong Kong, and we make recommendations for emergency management of hydroxychloroquine overdose based on our and other's experience. Find patient medical information for Hydroxychloroquine Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. 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. Hydroxychloroquine overdose toxicokinetics and management Massive hydroxychloroquine overdose Request PDF, Hydroxychloroquine overdose case report and recommendations. Chloroquine phosphate solubilityPlaquenil cardiotoxicityChloroquine phosphate pricePlaquenil and ambienPlaquenil ear pain Toxicokinetics Both chloroquine and hydroxychloroquine have excellent oral absorption and bioavailability. Both have a long and variable plasma elimination half-life because of a high volume of distribution, an extended mean residence time HCQ 1300 hours and CQ 900 hours and with about half the drug metabolites undergoing unmodified renal clearance. Chloroquine And Hydroxychloroquine Toxicity - Abstract.. Hydroxychloroquine Oral Uses, Side Effects, Interactions.. Toxicokinetics of hydroxychloroquine following a massive overdose. Sep 13, 2019 Symptoms of overdose. Drowsiness; dry mouth; increased thirst; loss of appetite; mood changes; no pulse or blood pressure; numbness or tingling in the hands, feet, or lips; unconsciousness; Some side effects of hydroxychloroquine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Hydroxychloroquine overdose is infrequently reported and the majority of recommendations come from the greater experience with chloroquine poisoning. We report two cases of massive hydroxychloroquine poisoning 20 g in each case, both of which received advanced cardiac life support and a treatment regimen consisting of sodium bicarbonate, adrenaline and potassium. Mechanism of Toxicity. The mechanism of hydroxychloroquine retinal toxicity has yet to be fully elucidated. Studies have shown that the drug affects the metabolism of retinal cells and also binds to melanin in the RPE, which could explain the persistent toxicity after discontinuation of the medication.