"Horse dewormer" is as accurate as it can possibly be. It is also used extensively as a cow dewormer and pet dewormer. People are going to veterinarian and pet shops to buy paste sold to deworm horses and cows to take it themselves. They are not taking drugs produced for human consumption. They are going with the animal products designed and sold to give to animals.
https://arstechnica.com/science/2021/08/more-people-are-pois...
Calling it a dewormer in this context is a lie of omission.
But salicylic acid is also used in skin care products like wart remover.
Here's a wart remover product for dogs and horses, which contains salicylic acid as an active ingredient: https://www.chewy.com/creative-science-wartsoff-wart-dog/dp/...
If, the next time you have a fever, you reach for the dog/horse wart remover... I'm gonna call that "dog wart remover" regardless of the fact that it contains an ingredient that is used to treat fevers in _humans_
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[0]: https://twitter.com/us_fda/status/1429050070243192839
[1]: https://www.nytimes.com/2021/08/30/health/covid-ivermectin-p...