A Multiple-Dose Study to Assess the Effects of Azithromycin plus Chloroquine on Electrocardiograms in Healthy Subjects - COVID-19

Chloroquine, hydroxychloroquine and azithromycin have been widely recommended and used in COVID-19. There has been more interest in these drugs than any other interventions with strong statements about safety and toxicity which have not been evidence-based. In particular the effect of chloroquine or hydroxychloroquine on the electrocardiogram (ECG) (notably QT prolongation) has been a focus of concern. This is now the main reason for stopping studies and stopping medications in individuals. We wish to conduct an individual patient meta-analysis of the relationship between plasma concentrations of the parent drug and metabolite and the ECG changes to provide a sound evidence base and guidance for currently used COVID-19 drug regimens. We will combine individual data from healthy volunteers, malaria patients chloroquine self-poisoning. Until we gather all the data we cannot give precise numbers but the approximate total of subjects studied will be 200. All except the requested Pfizer data have been published in peer review open access journals.