Itching Problem

I just adopted a dog 4 months ago. First two week, He was ok. The itching problem started after I baith him.I though maybe the shampoo,and I changed it . But still had the problem and he even scratched more often. I took him back to clinic 2 times. The Vet gave me same medicine,Prednisone n other else. And now he has another issue with his right ear because he scratched alot too.What should I do with his problem? Thank you

[Dr. Carol Osborne, DVM]

Chlorpheniramine maleate is a safe, mild antihistamine effective to relieve itching and has none of the adverse side effects associated with steroids like prednisone. Other helpful strategies to relieve dog allergies include weekly baths in organic oatmeal shampoo, feeding a hypoallergenic diet, and drinking distilled water. See your vet about his ears as he may have an ear infection called Otitis externa.
Dr Carol Osborne, DVM