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My new 25lb dog is itchy after a flea bath. How much Benadryl?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | spayed | 4 years and 6 months old | 25 lbs

new dog itchy not sure why.. Chihuahua and bulldog...about 2-4 yo ,20-25lbs, bathed in flea and tick shampoo today... how much Benadryl?

1 Answer

Most Helpful Answer

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Answered By Emily Fukuzato, DVM

Veterinarian

Published on July 2nd, 2017

You can give 25mg Benadryl Allergy (diphenhydramine), generic is okay, by mouth every 8-12 hours as needed for itching. Benadryl can cause mild sedation but is otherwise well tolerated in dogs. If the itching is not improving within a couple days I would recommend you call your vet about getting an appointment. Bulldogs can have pretty bad allergies and develop secondary skin infections. Chihuahuas can be allergic dogs as well.

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