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Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 2 years old | 28 lbs
My dog recieved trifexis at the beginning of the month for heart worm prevention. My vet did not confirm what preventative he was on and he gave the pro heart injection. When I explained that he had trifexis they told me to watch for side effects and let them know. I was wondering what serious side I should look out for. He has not had any side effects from trifexis or the injection prior to this.
1 Answer

Answered By Linda G, MS, DVM
Veterinarian
Published on September 9th, 2019