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What are the common side effects of Nexgard I should know for my dog?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | 10 months and 3 days old | 52.9 lbs

Hello doctor! Does Nexgard have any side effects?

1 Answer

Most Helpful Answer

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on November 28th, 2018

Yes. Like all medications, there can be side effects, including vomiting and diarrhea. Here is the product insert that discusses everything about the medication. Look at the section called "Adverse Effects": https://nexgardfordogs.com/assets/NexGard_PI.pdf

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