What kind of medicine would I get to treat a dog that is covered with ticks

They'll probably first need to be dipped to knock them off. Then I keep our dogs on Bravecto for fleas and ticks.

Then they need to see a vet regarding tick borne diseases. Lyme disease, Ehrlichiosis, Anaplasmosis, Rocky Mountain Spotted Fever, Babesiosis, Bartonellosis, and Hepatozoonosis.

Bravecto the best Petharmor is really good you can get this on Walmart not the bravecto

Unless you adopted the dog from ACS, I'm not sure but I think you'd have to go to your own Veterinary