Fenbendazole: Patient Information & Safety Notes
Also known as Febenazole, Panacur, Safe-Guard
Other names: febenazole, panacur, safe-guard
Fenbendazole is a veterinary antiparasitic drug that is not approved for human use in the United States. Laboratory and animal studies do not establish that it is safe or effective as a cancer treatment in humans.
In plain language
What Fenbendazole is used for
- Preclinical research has examined fenbendazole in cancer models, but it is not an approved or recommended cancer treatment for humans.
Taking this medicine
How it is administered
- Veterinary oral formulations exist; there is no FDA-approved human dosage form
Read before you decide
Risks and precautions
Risks and warnings
- Diarrhea
- Potential liver toxicity (hepatotoxicity) — case reports exist
- Unknown interactions with cancer treatments
Who should not take it
- Liver or kidney disease
- Concurrent cytotoxic chemotherapy (unknown interactions)
- Pregnancy
Common questions
Patient questions
Is fenbendazole (Panacur) a proven cancer treatment?
No. Fenbendazole is a veterinary-only antiparasitic not approved for human use by the FDA. It has not been proven effective as a cancer treatment in peer-reviewed randomized controlled trials in humans. Interest in cancer applications comes from anecdotal case reports and preclinical (cell and animal) studies only. It should never replace oncologist-recommended cancer therapies.
Is fenbendazole safe for humans?
Fenbendazole is FDA-approved only as a veterinary drug (Panacur, Safe-Guard) — it is not approved for human use. Veterinary formulations are not manufactured under human pharmaceutical standards. There is no established safe dose for humans, and case reports of hepatotoxicity exist. Do not self-medicate with veterinary products.
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This information is educational — not medical advice.
This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.