COVID MED - An Early Pandemic Trial of Losartan for Hospitalized COVID-19 Patients
D. Freilich, J. Victory, P. Jenkins, J. Wheeler, G. M. Vail, E. Riesenfeld, P. Cross, C. Gilmore, M. Huckabone, A. Schworm, U. Boregowda, F. Deshmukh, Y. Choi, A. Kahn, A. Gadomski,
Abstract
Background ACEi/ARB medications have been hypothesized to have potential benefit in COVID-19. Despite concern for increased ACE-2 expression in some animal models, preclinical and observational-retrospective and uncontrolled trials suggested possible benefit. Two RCTs of the ARB losartan from University of Minnesota showed no benefit yet safety signals for losartan in outpatient and hospitalized COVID-19 patients. COVID MED, started early in the pandemic, also assessed losartan in a RCT in hospitalized patients with COVID-19. Methods COVID MED was quadruple-blinded, placebo-controlled, multicenter randomized clinical trial (RCT). Hospitalized COVID-19 patients were randomized to receive standard care and hydroxychloroquine, lopinavir/ritonavir, losartan, or placebo. Hydroxychloroquine and lopinavir/ritonavir arms were discontinued after RCTs showed no benefit. We report data from the losartan arm compared to combined (lopinavir-ritonavir and placebo) and prespecified placebo-only controls. The primary endpoint was the NCOSS slope of change. Slow enrollment prompted early stopping. Results Of 432 screened patients, 14 were enrolled (3.5%), 9 received losartan and 5 combined control (lopinavir/ritonavir [N=2], placebo [N=3]); 1 hydroxychloroquine arm patient was excluded. Most baseline parameters were balanced. Treatment with losartan was not associated with a difference in NCOSS slope of change in comparison with combined control (p=0.4) or placebo-only control (p=0.05) (trend favoring placebo). 60-day mortality and overall AE and SAE rates were numerically but not significantly higher with losartan. Conclusions In this small blinded RCT in hospitalized COVID-19 patients, losartan did not improve outcome vs. control comparisons and was associated with adverse safety signals.
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