The Medical Advisor

Medically Reviewed by: Dr Frank Yap, MD | Written and Compiled by:     OneDayMD Editorial Team | Last Updated: October 2026 Fenbendazole is a broad spectrum anti-parasitic used against gastrointestinal parasites including: giardia, roundworms, hookworms, whipworms, the tapeworm genus Taenia (but not effective against Dipylidium caninum, a common dog tapeworm), pinworms, aelurostrongylus, paragonimiasis, strongyles, and strongyloides that can be administered to sheep, cattle, horses, fish, dogs, cats, rabbits, most reptiles, freshwater shrimp tanks as planaria and hydra treatments, as well as seals. (2) Fenbendazole, has garnered ⁤attention​ for its potential use ​in‍ humans.‍ The Fenbendazole Cancer Protocol gained rapid interest over the past years following some fenbendazole advanced cancer success stories  (more than 500 case reports). Joe Tippens founded the protocol  after he was told a story about a scientist at Merck Animal H...

Introduction Cancers of the female reproductive system, including ovarian, endometrial (uterine), and cervical cancers, represent a significant global health burden, often presenting at advanced stages with limited treatment options and poor prognosis. Conventional therapies such as chemotherapy, radiation, and surgery, while effective in some cases, frequently fail in recurrent or metastatic disease, prompting exploration of drug repurposing strategies.  This compilation examines emerging case reports on the off-label use of antiparasitic agents—primarily ivermectin and fenbendazole, alongside related benzimidazoles like mebendazole—in managing these malignancies. Drawing from 19 documented cases, the article categorizes outcomes by cancer type and integrates mechanistic insights from preclinical studies, where these compounds have demonstrated antitumor effects such as microtubule disruption, inhibition of oncogenic signaling pathways (e.g., PAK1, Wnt/β-catenin), induction of apo...