If you can find out the animal equivalent, it can often be ordered online or out of a catalog. Only rarely is a script from a veterinarian required. If you can find a friendly vet, there might be help with both issues.
Confession: I had the Covid-19 twice (despite both jabs and a booster). Both times, I took a 1/5th dose of Ivermectin sold at my local Agway store. It was a 1/5th dose because the standard is designed for a 1250 pound horse. I was over the worst symptoms in three days and tested negative in five.
“If you can find out the animal equivalent, it can often be ordered online or out of a catalog”
The vet supply availability ended over the last few months (in the U.S.). The FDA threatened them with legal action and now even the legit livestock owners need Rx from a vet. So no more easy to get amoxicillin, etc.
4 notches on the plunger for me.
Took it prophylactically a few times, and when I finally actually got Covid in early 2022.
Useful Ivermectin links, lots of them:
https://patriots.win/p/12kFwWqqxx/x/c/4JEWdG3IkXQ