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Why is my puppy shaking after his Revolution flea treatment?

Updated on September 23rd, 2025

Pet's info: Dog | Chihuahua (Long Coat) | Male | unneutered | 6 months and 19 days old | 2.3 lbs

My 13 week old Chihuahua got his first dose age of revolution for kittens and puppies and about an hour or two later he started having these little tremors. They didn’t last long or anything but I don’t know if it’s a reaction to the revolution and I don’t know if I need to bring him to a local animal hospital ?

1 Answer

Most Helpful Answer

Linda G,  MS, DVM

Answered By Linda G, MS, DVM

Veterinarian

Published on July 20th, 2019

Hello. Revolution has been one of the safest flea & heartworm preventative you can buy, & about the only thing you can purchase for tiny babies. If the tremors were very brief & Bear continues to act well, I would not be concerned. It is difficult to say if the Revolution actually caused any tremors, but if he is acting well, there should be no need to worry further. If you are concerned, just bathe him in dish soap, but this is not a necessity if he is acting fine. Thanks for using Petco Pet Education Center, formerly Petcoach.
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