Side Effects of Panacur in Dogs

Updated November 21, 2016

Panacur (or fenbendazole) is an antiparasitic medication used in large and small animals, including cats and dogs. While it is generally safe, some side effects have been reported with the use of Panacur.


Panacur is used to treat roundworms, hookworms and whipworms. It is not effective against the common tapeworm but is effective in treating the Taneia tapeworm.

Drug Interactions

There are no known drug interactions with Panacur in small or large dogs.

Common Side Effects

The most common side effect associated with the use of Panacur is stomach upset. Some dogs may experience nausea and vomiting after treatment.


Panacur is considered safe for use in pregnant dogs. There are no known associated birth defects.


Contact your veterinarian immediately if your dog seems especially lethargic or sick after use of Panacur.


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About the Author

Tracy Hodge has been a professional writer since 2007. She currently writes content for various websites, specializing in health and fitness. Hodge also does ghostwriting projects for books, as well as poetry pieces. She has studied nutrition extensively, especially bodybuilding diets and nutritional supplements.