Will Benadryl make my dog drowsy? Do dogs build up a tolerance?

Question

Does Benadryl cause drowsiness in dogs? Also if used daily do they tend to build up a tolerance so it doesn’t work as well long term if used daily? Pet's info: Dog | Mixed Breed | Female | 5 years and 8 months old | 11 lbs

Catherine Stecyk · Accepted Answer

Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. Benadryl can definitely cause drowsiness in some dogs, but this tends to be dose-dependent, meaning the higher the dose, the more likely a dog is to become drowsy. Some dogs are not very affected, though. We do not typically see a tolerance built up. The dose range is pretty wide, though, and Benadryl can be safely given up to 4 times per day. Depending on the reason that Kiwi is taking the Benadryl, I recommend consulting with your vet to see what dose & frequency they recommend. I hope this is helpful!

Will Benadryl make my dog drowsy? Do dogs build up a tolerance?

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