That's the main reason I never got any Ivermectin. Those sites weren't exactly shady, but they were all based in India selling Indian brands made in Indian factories, and who knows how much chalk or sawdust they are filling the tabs with.

Also I wasn't even worried about COVID19 so there's that. All the Ivermectin does - if you take it early enough - is make you less likely to have such a bad immune reaction that you have to go to the hospital. But that's very unlikely to begin with.