Insufficient scientific data, no rationale
After chloroquine, same kind of fallacies are used to push ivermectine..
"Ivermectin has been shown to inhibit the replication of SARS-CoV-2 in cell cultures. However, pharmacokinetic and pharmacodynamic studies suggest that achieving the plasma concentrations necessary for the antiviral efficacy detected in vitro would require administration of doses up to 100-fold higher than those approved for use in humans."
https://www.covid19treatmentguidelines.nih.gov/antiviral-the...
"Ivermectin has been shown to inhibit the replication of SARS-CoV-2 in cell cultures. However, pharmacokinetic and pharmacodynamic studies suggest that achieving the plasma concentrations necessary for the antiviral efficacy detected in vitro would require administration of doses up to 100-fold higher than those approved for use in humans." https://www.covid19treatmentguidelines.nih.gov/antiviral-the...