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My puppy has diarrhea after deworming. When can I give next dose?

Updated On September 23rd, 2025

Pet's info: Dog | Doberman Pinscher | Male | unneutered | 2 months and 18 days old | 15.43 lbs

Does worming tablets cause diarrhoea in dogs? My puppy was given a worming tablet last Sunday and would have been due for another yesterday however I did not as he only just recovered from the diarrhoea. (we were advised it was one every week until he is 12 weeks) he pooped normally but today he has not pooped this morning and threw up a little it was white. He had some breakfast. Should I be concerned? Also do you advise I should give him another worming tablet today or wait another week?

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 18th, 2018

Yes, deworming tablets can cause some diarrhea in puppies, but it could also be due to the dead worms moving through Hunter's intestines. Given that he has just recovered from diarrhea, I recommend waiting another week before giving him the next deworming tablet. It's fine to deworm him every two weeks until he is 12 weeks of age, then he should be dewormed monthly until six months of age. After that, he needs to be dewormed every three months. Good luck, I hope this helps!

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