What medicine should I buy to get rid of fleas on my golden retriever?

If you have fleas on your Golden Retriever, you can use dog-specific external repellent drops, external repellent sprays, repellent collars, or medicated baths to remove them. External repellent drops are more effective and easy to operate. It is relatively simple, just drop it on the skin of the back of the dog's neck; if you use a spray, put an Elizabethan ring on the dog to prevent the dog from accidentally licking it and being poisoned.
Tip:
The repellent collar is mainly for prevention and may not be effective in removing fleas; while medicated baths It is more troublesome to do, and it needs to be done every three days in the early stage.