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My dog has rice-like worms and is vomiting blood after Panacur. Why?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | neutered | 5 years and 2 months old | 65 lbs

My 5 year old lab had rice looking worms in his poop a week and a half ago, I checked for pain, lethargy and lack of appetite but he seemed ok. I gave him otc panacur c to treat for worms 7 days ago and completed the 3 day treatment. Took him for a hike on Saturday and he threw up Saturday evening. He threw up again this morning and one of them had a ping pong size ball of food. I gave him some water and fed him dinner and he threw up this time with a little bit of blood (reddish saliva)pls help

1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on October 29th, 2017

Rice looking worms are most commonly tapeworm segments. Panacur does not kill tapeworm. However, it is also uncommon for tapes to cause vomiting. Since the vomiting has continued for 24 hours I would highly encourage you to have him seen by a veterinarian as soon as possible. Gastritis, intestinal foreign body, pancreatitis are all possibilities among other things. They will likely recommend an x-ray and possibly lab work as well. Best of luck and I hope he improves soon.

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