Thank you so much! She did have a cortisone shot as well. Her ear was swollen, and he said it would help with that and the itching she had. Should these subside soon?
Ear problems and itchy skin can be a result of food allergies or Atopy (environmental allergies). Dogs can be allergic to anything humans are allergic to, such as any kind of food and anything in the environment. Common food allergies include: chicken, beef, lamb, to name a few. Common environmental allergies include: dust mites, storage mites (common mites in any packaged food), flea allergies, tree and grass pollen, You Name It!
I find few allergic dogs with just one allergy; usually it is a combination of allergies. However, if your dog is food allergic, than controlling the diet can make the other allergies much less severe. As far an the antibiotic, she could have a sensitivity to this medication and it could cause the side-effects you are describing. I would call your veterinarian and ask for a different antibiotic. Did your vet also prescribe a steroid or give a steroid injection? If so, that could be the cause of increased urination and inappropriate urination.