The study found no difference between the treated group versus the control group in the viral load detected by PCR, but treated patients recovered twice as fast.
Title: "The effect of early treatment with ivermectin on viral load, symptoms and humoral response in patients with non-severe COVID-19: A pilot, double-blind, placebo-controlled, randomized clinical trial", by Carlos Chaccour et al., The Lancet, January 19, 2021
https://www.thelancet.com/journals/eclinm/article/PIIS2589-5370(20)30464-8/fulltext