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Sentinel for dogs: When do allergic reactions or side effects begin?
Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed | Male | neutered | 2 months and 17 days old | 13 lbs
Giving Sentinel for the first time today. Within how many minutes/hours will I see an allergic reaction if any? Is it common to get side effects from this? Luke is healthy and has never had any worms
1 Answer
Most Helpful Answer
Answered By Dr. Leigh, DVM
Veterinarian
Published on April 18th, 2018
Sentinel is a very safe and effective medication. Allergic reactions could potentially occur quickly after giving the medications or a day or so later. If your puppy is healthy then the chance of a reaction is very low.
1Pet Parents found this answer helpful