Updated On September 23rd, 2025
Pet's info: Dog | Border Collie | Female | spayed | 5 years and 2 months old | 38.2 lbs
My 35 pound dog (Rumor 6 years old Border Collie) MAY, not sure, have taken her Trifexis heartworm pill along with my 45 lbs dogs. I just don't know. I didn't see who ate it. This was yesterday. If anything was going to happen, when would I see signs? If she seems fine, is she ok to exercise and eat like she normally has? Any thoughts to share?
1 Answer
Published on August 4th, 2019
Hi there. Trifexis has a very wide margin of safety (a dog could eat an entire box and not have any serious issues, in most cases), so it's unlikely that this will cause any problems. The most likely side effect would be vomiting or GI upset, in the first day or two after taking the meds. If she's acting normal so far, you probably won't see any issues at all. It's fine for her to continue with her normal daily routine as far as eating, exercising, etc.
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