Call your vet
For mild itching, vets sometimes recommend an antihistamine such as Benadryl (diphenhydramine) or Zyrtec (cetirizine), along with gentle oatmeal baths, omega-3 fatty acids and strict flea control. Antihistamines only help some dogs. For ongoing itching, your vet can prescribe more effective treatments such as oclacitinib (Apoquel) or lokivetmab (Cytopoint).
See a vet now if you notice:
- Swelling of the face, lips or throat
- Hives with vomiting, weakness or trouble breathing (possible anaphylaxis)
- Open sores, hot spots, bleeding or a bad smell from the skin
- Constant scratching that stops your dog from sleeping
- Ear head-shaking with discharge or odor
Safe things to try (with your vet's OK)
- Use year-round flea prevention for every pet in the home. Flea allergy is the most common cause of itching in dogs.
- Bathe with a gentle, soap-free oatmeal or vet-recommended shampoo; rinse well.
- Wipe paws and belly after walks to remove pollen.
- Ask your vet about omega-3 fatty acids (fish oil), which support the skin barrier.
- Antihistamines: the usual Benadryl dose is 1 mg per lb. See our Benadryl dosage calculator. Ask your vet before trying cetirizine (Zyrtec) and for the dose.
Products to avoid
- Antihistamines combined with decongestants (Zyrtec-D, Claritin-D, Benadryl-D)
- Tea tree oil and other essential oils on the skin
- Human hydrocortisone creams on areas your dog can lick, unless your vet agrees
- Leftover steroids or another pet's medicine