I'm not sure about that brand, never heard of it. Here in the states we use just dog/cat ear mite medicine, as for fleas we use ONE DROP of advantage (you can use dog or cat advantage just use one drop per pound of body weight). we also use Adams flea spray (but be careful not to get it into their eyes)

also after you apply it make sure you keep your ferret occupied until it dries so they dont lick any off that may make them sick.

If her vet gave her the meds I would assume they would be just fine! good luck.