Why is my puppy passing live worms after deworming medicine?

Question

So I found this worm in my puppy's stool yesterday. We gave her her interceptor plus on Tuesday. Is it normal for them to pass the worms after the interceptor plus? This worm was still alive and should I be concerned or it it just the worm medicine doing its job? Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | 2 months and 28 days old | 11 lbs

Kevin Sanada, DVM · Accepted Answer

Yes, it's very common to see the worms after giving the deworm medication. This type of deworm medication works by inhibiting the nerves in the worm. While this usually does kill the worm, they may be somewhat alive still when they are passed in the stool. The fact that the worm came out indicates that it is at-least debilitated. If this was Millie's first deworm tablet, then it's best to give another one (like drontal plus) in two weeks to make sure you get all the worms. I hope that helps.

Why is my puppy passing live worms after deworming medicine?

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