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Featuring Demian Dressler, DVM and Sue Ettinger, DVM, Dip. ACVIM (Oncology), authors of The Dog Cancer Survival Guide

Panacur for Cancer In Dogs: Does This Dewormer Work for Dogs with Cancer?

Updated: July 12th, 2021


Panacur for cancer in dogs?? It’s a dewormer! #dogcancerconfusion​! Time to ask Dr. Nancy Reese to do some research.

In this week’s episode of Dog Cancer Answers, Dr. Nancy Reese answers a caller’s question about using a dewormer, fenbendazole, brand-name Panacur, for dogs in cancer.

Does Panacur Help Dogs with Cancer?

Sandy called our Listener Line (you can too! Call +1 808-868-3200) and left a recorded question for our veterinarians. She’s been reading about Panacur, also called fenbendazole. Does the dewormer help dogs with cancer? Or does it, as some folks say, make cancer worse?

Dr. Nancy Reese joins host James Jacobson to answer this most-interesting question.

Research on Fenbendazole for Cancer

Why Dr. Nancy? Because not only is she a practicing veterinarian with over 30 years of experience … she’s also got a Ph.D. in Epidemiology. That means she’s an expert on deciphering and assessing scientific papers.

And the results of her research on fenbendazole were fascinating.

As with so many things dog cancer, the answer is not clear-cut. It’s not “yes, absolutely, use Panacur.” It’s also not “no, definitely do not use Panacur.”

It is, as always, more complicated.

Here’s the video version of today’s podcast:

You can also read the transcript on the episode page on the Dog Cancer Answers website.

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Warm Aloha,


This book is a must-read, whether your dog has cancer or not. Cancer is the #1 killer of dogs. One out of three dogs get cancer, and 1 out of 2 dogs over the age of ten do. If you have a dog, you are going to face it eventually. Be prepared!

If your dog has cancer, and you have read or are reading The Dog Cancer Survival Guide, please join our private Facebook Group for readers.

Leave a Comment

  1. Paul Keen on February 23, 2021 at 10:03 pm

    All I can say is that this is the most comprehensive writing I have found regarding dog cancers, treatments and feeding. If I had this book 10 years ago our dear Nila, a Pembroke Welsh Corgi would still be with us. We found this book and this site just a. It too late. It is now my aim to aim people to this page/site and the book so others do not have to go through the heart wrenching times we had to. My cry now is “kibble kills”. This book is essential reading for present fogs owners and certainly for those contemplating getting a dog.

    • Molly Jacobson on February 24, 2021 at 10:48 am

      Paul, thank you so much for your comment.

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