Fenbendazole is widely used as an anthelmintic agent, primarily in veterinary medicine, to treat parasitic worm infestations. It is effective against a broad spectrum of gastrointestinal parasites including roundworms, hookworms, whipworms, and certain types of tapeworms. Commonly administered to livestock such as cattle, sheep, and pigs, it helps improve weight gain, feed efficiency, and overall health by eliminating parasitic burdens. It is also used in companion animals like dogs and cats, often in the form of oral suspensions or tablets. In addition to its antiparasitic use, fenbendazole has gained attention for its potential off-label applications. Some studies and anecdotal reports suggest it may have antitumor properties, leading to experimental use in cancer research, particularly in combination with other therapies. However, this application remains investigational and is not approved for human use. Its low toxicity and ability to disrupt microtubule formation in cells contribute to ongoing interest in repurposing the drug.