This is a controversial issue surrounding the safety and efficacy of Ivermectin, a prescription drug, as an COVID-19 treatment. Edit: the issue surrounds efficacy too.
This is not an issue around the safety of Ivermectin, as it is an incredibly well-known drug that is now off patent. This is a discussion around efficacy. It is similar to the MD asks around using a Zpak for Covid.
When ivermectin is used for it's original purpose, the treatment is usually a one-time dose. However for covid people have been taking higher doses and for a prolonged period of time, in the misguided belief that it protects against covid.
https://oglobo.globo.com/sociedade/ao-menos-quatro-pacientes...