The anthelmintic medicine fenbendazole has been used for years to treat parasitic worm infections in dogs. Multiple peer-reviewed scientific journals support the fact that it may also be able to cure a variety of harmful malignancies in humans.

The drug has been shown to suppress the growth of cancer cells in a petri dish and in mice by blocking the proper growth of microtubules, which are a part of the cytoskeleton that provides structure and shape to a cell. The same mechanism of action is used by many cytotoxic anticancer agents, including vinca alkaloids and taxanes.

In a recent post on Facebook and TikTok, an unlicensed veterinarian named Andrew Jones promoted dog deworming medicine as a "cure" for human cancer. The claims were based on unsubstantiated evidence and he was reprimanded by his professional body for the promotion of alternative medicines.

According to specialist cancer information nurses at Cancer Research UK, there is insufficient evidence that fenbendazole can cure or prevent cancer in people. The drugs have not been tested on human volunteers and they need to be rigorously tested for safety and effectiveness.

The fenbendazole study in the journal PLOS One found that three daily injections of 50 mg/kg fenbendazole significantly reduced tumor volume in the mice, compared to control mice who received no fenbendazole or x-rays (p0.001). No other observable changes were seen between the groups, including the appearance and behavior of the mice or their weights.fenbendazole for humans