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I accidentally gave my dog two flea treatments. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 50 lbs

Accidentally applied two 1 month topical flea treatment (Bayer Advantage II for large dogs) within 2 days. What should I do?

1 Answer

Most Helpful Answer

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Answered By Lauren Celestin, DVM

Veterinarian, Veterinary Dentistry Resident

Published on July 26th, 2017

Hello there! I would recommend you give Sky a bath if you recently (within a few hours) applied the second dose. Continue to monitor her for any unusual behavior, vomiting, diarrhea, skin irritation, etc for the next 12-24 hrs. If you notice any changes Sky should be seen by a veterinarian as soon as possible. You can continue the next months does as scheduled. I suspect that Sky will likely be fine, but definitely keep an eye on her. Hope this helps!

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