It is the same thing. They use human meds for pets. I've had to fill pet scripts at the human pharmacy plenty of times before.

I order fish antibiotics and have used them when I got an infection. When my cat got an abscess I used them on her, too. I'm allergic to a lot of them because they gave me too large of doses as a kid but surprisingly enough they even have the one available for fish that I am not allergic to.