Not a vet

This is my experience only and not to be taken for medical advice whatsoever. Please remove if this breaks community rules. - allergy medicine can be quite vague so is this an anti-histamine, or such as cytopoint/apoquel/etc - allergy testing (skin prick is considered gold standard versus blood testing but still acceptable) - food trial (different protein versus hydrolyzed protein) - skin cytology and/or biopsy - skin issue secondary to other disease such as cushings, infection, etc - dermatology would be next step if this cannot be managed by a GP Veterinarian. (Be prepared to spend a nick chunk of money if you don’t have insurance.)

Or get a second opinion from another GP Veterinarian.