Hydroxychloroquine with or Without Azithromycin for Treatment of Early SARS-CoV-2 Infection Among High-Risk Outpatient Adults: A Randomized Clinical Trial (preprint)

ABSTRACT

Background: Treatment options for outpatients with COVID-19 could reduce morbidity and prevent SARS-CoV-2 transmission.Methods: In this randomized, double-blind, three-arm (111) placebo-equivalent control trial conducted remotely throughout the United States, adult outpatients with laboratory-confirmed SARS-CoV-2 infection were recruited. Participants were randomly assigned to receive HCQ (400mg BID x1day, followed by 200mg BID x9days) or placebo-equivalent (ascorbic acid) and AZ (500mg, then 250mg daily x4days) or placebo-equivalent (folic acid), stratified by risk for progression to severe COVID-19 (high-risk vs. low-risk). Self-collected mid-turbinate nasal swabs for SARS-CoV-2 PCR, FLUPro symptom surveys, EKGs and vital signs collected daily. Primary endpoints were (a) 14-day progression to lower respiratory tract infection (LRTI), 28-day COVID-19 related hospitalization, or death; (b) 14-day time to viral clearance; secondary endpoints included time to symptom resolution (ClinicalTrials.gov NCT04354428). Due to the low rate of clinical outcomes, the study was terminated for operational futility.Findings: Between 15th April and 27th July 2020, 231 participants were enrolled and 219 initiated medication a median of 5.9 days after symptom onset. Incident LRTI occurred in six participants (two control, four HCQ/AZ) and COVID-19 related hospitalization in nine (four control, two HCQ, three HCQ/AZ). There were no deaths. Median time to clearance was 5 days (95% CI=4-6) in HCQ, 6 days (95% CI=4-8) in HCQ/AZ, and 8 days (95% CI=6-10) in control. HCQ but not HCQ/AZ had faster time to viral clearance (HR=1.62, 95% CI=1.01-2.60, p=0.047 & HR=1.25, 95% CI=0.75-2.07, p=0.39) compared to control. Among 197 participants who met the COVID-19 definition at enrollment, time to symptom resolution did not differ by group.Interpretation: Neither HCQ nor HCQ/AZ shortened the clinical course of outpatients with COVID-19, and HCQ, but not HCQ/AZ, had only a modest effect on SARS-CoV-2 viral shedding. HCQ and HCQ/AZ are not effective therapies for outpatient treatment of SARV-CoV-2 infection.Trial Registration Number ClinicalTrials.gov NCT04354428Funding: The COVID-19 Early Treatment Study was funded by the Bill & Melinda Gates Foundation (INV-017062) through the COVID-19 Therapeutics Accelerator. University of Washington Institute of Translational Health Science (ITHS) grant support (UL1 TR002319), KL2 TR002317, and TL1 TR002318 from NCATS/NIH funded REDCap. The content is solely the responsibility of the authors and does not necessarily represent the views, decisions, or policies of the institutions with which they are affiliated. PAN and MJA were supported by the Mayo Clinic Windland Smith Rice Comprehensive Sudden Cardiac Death Program. Conflict of Interest Declaration of interests CJ reports grants from BMGF for conduct of the study, and grants from CDC and NIH outside of the submitted work. HSK reports funding from NIH. PAN and MJA have a potential financial relationship with AliveCor related to QT assessment using the device, however the investigators would receive no financial benefit for use of the technology for patients at Mayo Clinic or for its use in the current study. AB reports consulting for Gates Ventures and grants from BMGF and NIH outside of the submitted work. HYC reports consulting for BMGF, Pfizer, Ellume, and Merck, and grants from Gates Ventures, NIH, CDC, BMGF, DARPA, Apple Inc., Sanofi-Pasteur, and Roche-Genentech, outside of the submitted work. Ethical Approval Study visits were conducted via Health Insurance Portability and Accountability Act (HIPAA)-compliant telemedicine. The Western Institutional Review Board (WIRB) approved this study with reliance agreements with collaborating institutions.