Heartgard for your dog is Ivermectin. Also available without a prescription at the feed store for horses.
I assume the dosage is different for a dog than a person
There is a paste form of Ivermectin for horses. One brand name is Durvet, and it’s available at feed stores.
Tractor Supply still has ivermectin in the horse meds area. My local store has signs all over saying WARNING! WARNING! Not for human Wuhan flu! I would rather get the pills from a doctor, but I’m thinking I’ll spend the $40 and buy some, just in case. Pathetic that our once great nation has devolved into us having to figure this crap out, on our own....