Drug resistant hookworm is a common thing for greyhounds in the US, and this is a big problem. How did we get rid of it? Let me share that with you our failures, and our success. I am NOT a veterinarian, so please take this advice and consult YOUR vet on this. Every dog is different.

Medication I mentioned:
Drontal Plus
Pyrantel Pamoate
Panacur C
Advantage multi plus
Probiotic I use: https://www.chewy.com/nutramaxprovia...

Someone off my IG also mentioned that a medication used for cats has been successful to clear dogs off drug resistant hookworm: Profender.

Hope this helps!