“However, the products used to treat humans are different from the ones used on animals, which are often highly concentrated because they are used for large animals like horses and cows.”
Actually, the following is based on published concentrations for a tube of horse wormer I have:
12 mg a day for five days if positive for Covid or symptoms. (https://www.ijidonline.com/article/S1201-9712(20)32506-6/fulltext)
“For early outpatients with COVID-19, the protocol calls for one dose of ivermectin at 0.2 mg/kg at day 1 and day 3, along with the same daily vitamins and 325 mg per day of aspirin.”
“100 patients with Mild/Moderate COVID-19 (Coronavirus disease) infection received a 4-days course of Ivermectin 400 mcg/kg body weight maximum 4 tablets (6mg / tablet) once daily dose before breakfast plus standard of care as issued by Egyptian protocol of COVID-19 treatment.”
https://clinicaltrials.gov/ct2/show/NCT04668469
From a package meant for horses: “This syringe contains sufficient paste to treat one 1250 lb horse at the recommended dose rate of 91 mcg ivermectin per lb (200 mcg/kg) body weight.” 91 mcg times 1250 gives 113,750 mcg or 114 mg/tube.
https://www.statelinetack.com/contentfiles/Associated_Content/BimectinInfoSheet.pdf
12 mg would then be about 1/10 of a tube.
A 160 lb man getting 0.2 mg/kg would take 14 mg, which is just over 1/10th of a tube.
Folks are welcome to check my math. I know a person who has used it on herself with no ill effect.
bkmk
For those who are mathematically and metrically challenged, here are a few useful facts. A kg (kilogram) is roughly 2.2 pounds. Divide a pound (16 ounces by 5) to get the .2 lb.) So a kg is roughly 35+ ounces (16 + 16 + 3.?). One mg. (milligram) is equal to 1,000 mcg. (micrograms). Therefore, 0.2 mg is the same as 200 mcg. Happy calculating, and good night. A 1250 lb. horse weighs 10 times a 125 lb. woman. Therefore one tenth (1/10) the dose for the horse would be good for a 125 pound woman. Slightly smaller fractions of a dose would work for heavier men and women, like 1/8, or 1/6th. If this is too hard for you to calculate safely, find someone with good math skills to help determine the fraction of an animal dose that would be safe.