Purchase topical antibiotic cleaner and use two times daily. Ask your vet for another antibiotic prescription if this does not work. Be careful when using over the counter medication, though. If your pet does not have too much ear was, then the topical antibiotic will help. If your pet has a fever or the lymph nodes are swollen, then that is why the vet may have prescribed an antibiotic. You and your vet have to discuss this further to see what it is the best for our vet. You could ask about cytology or have the vet take a culture to find out more in depth knowledge about what is wrong with your pet.