Ivermectin is a medication used to treat many types of parasite infestations. This includes head lice, scabies, river blindness (onchocerciasis), strongyloidiasis, trichuriasis, ascariasis, and lymphatic filariasis. It can be taken by mouth or applied to the skin for external infestations.
This is a medication for human use
The generic might be used by vets. I’m still looking
Ivermectin is the “slow” treatment for heartworm in dogs. It doesn’t kill them it just prevents reproduction and the heartworm infection goes away as the adult parasitic worms die off naturally.
I’ve only known of this in regards to cattle.
https://www.tractorsupply.com/tsc/product/ivermectin-pour-on-for-cattle-5-l