Yep, I can see that on amethyst 👍🏻

By the way, I'm no vet but you should be OK using the manure.

If I remember my history ivermectin was developed from a bacteria found in soil by some Japanese researchers.

So I can't see any residue causing an issue. If in doubt plant non contact veg such as peas beans etc in it for the first year.

I think it will be fine as long as the concentration is not really high.

"Manure and bedding from 60 horses at Oxley Equestrian Facility, Cornell University, Ithaca, NY de-wormed with 114 mg ivermectin paste each, was collected over a 3-day period in 2011 for composting. The presence of ivermectin did not appear to affect the composting process as shown by thermophilic temperatures and proper mass loss. There was a severe drop in ivermectin concentration in the manure/bedding mixture within the first few days of composting indicating exponential decay. "

https://cwmi.css.cornell.edu/ivermectin.pdf

Generally speaking I would worry very little about composing any manure in fears of meds, if it is composted correctly, there shouldn’t be any residuals left by the time you use it, it be a different story if there were insecticide or herbicide in it