Can you give a dog medication for worms while on an antibiotic?

Depends on the type of worm. If you don't KNOW, ask your Vet. Pyrantel Pamoate Suspension is often used by kennel owners for pinworms. It's inexpensive and available without an Rx on the net.

Draw the correct amount by the dog's weight into a syringe (without the needle) and spray against the top of the dog's mouth (to keep it from going down the "wrong pipe"). Keep your dog's area clean, as in pick up waste immediately and check their stool to see if they need a second dose and minimize reinfection.

Pinworms can also be transferred to humans. If you train 20-30 dogs at a time, you're likely to catch them, sooner or later. The same formulation will work -- that's what it was made for -- it tastes pleasantly minty. Follow dosage on the container.