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- W3021000859 abstract "Abstract Hydroxychloroquine and chloroquine are used extensively in malaria and rheumatological conditions, and now in COVID-19 prevention and treatment. Although generally safe they are potentially lethal in overdose. In-vitro data suggest that high concentrations and thus high doses are needed for COVID-19 infections, but as yet there is no convincing evidence they are clinically effective. Bayesian regression models were fitted to survival outcomes and electrocardiograph QRS durations from 302 prospectively studied French patients who had taken intentional chloroquine overdoses, of whom 33 died (11%), and 16 healthy volunteers who took 620 mg base chloroquine single doses. Whole blood concentrations of 13.5 μ mol/L (95% credible interval 10.1-17.7) were associated with 1% mortality. Prolongation of ventricular depolarisation is concentration-dependent with a QRS duration >150 msec independently highly predictive of mortality. Pharmacokinetic modelling combined with these lethality data predicts that the majority of chloroquine regimens trialled in COVID-19 should not cause serious cardiovascular toxicity." @default.
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- W3021000859 date "2020-04-29" @default.
- W3021000859 modified "2023-10-18" @default.
- W3021000859 title "Concentration-dependent mortality of chloroquine in overdose" @default.
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- W3021000859 doi "https://doi.org/10.1101/2020.04.24.20078303" @default.
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