If I were you, I would do a bunch of research-go on the search engines and type up
antibiotics for cats. You should absolutely never give a
cat any human med without doing research, only listen to a vet. If the VET says a human med is safe for kitty, then go for it. Otherwise do not listen to anyone that tells you otherwise-because they are clueless.
Also, keep in mind, that whatever momma kitty gets, the kittens will get through her milk.
Good luck.