I prefer using horse paste pills (for humans) and iodine gargle. The cost of Regeneron is $2100/treatment, so we're still feeding the coffers of Pharma. In addition, the data from the clinical study feeding the 81% claim is not all that impressive in absolute numbers:

The late-stage study, jointly run with the National Institute of Allergy and Infectious Diseases, enrolled people who lived in a household with someone diagnosed with Covid within the previous four days. Earlier results from the trial showed the drug cut the risk of infection by 81% within the first month. The new data shows the protection was maintained, with an 82% reduction in symptomatic infections for as long as eight months after the therapy was administered.

During the study, none of the people in the treatment group were hospitalized due to Covid, compared with six people in the placebo group. No deaths stemming from Covid infection occurred in either group.

https://www.livemint.com/