Despite some studies in cancer cells and mice suggesting that the antiparasitic drug fenbendazole might be effective against cancer, there is no evidence from peer-reviewed clinical trials that it cures cancer in humans. It is not even approved for human use by Health Canada, and it should only be given under the care of a veterinarian.
Several social media posts and TikTok videos have claimed that the deworming medication fenbendazole cures cancer. The posts cite an anecdotal story of a man with lung cancer who was diagnosed and went into remission after taking fenbendazole on a veterinarian’s recommendation. The claims are false and misleading.
The anthelmintic drugs used to treat parasites in animals are being investigated as potential cancer treatments, and two of them (Albendazole and mebendazole) are currently undergoing clinical trials. However, there is no scientific evidence that fenbendazole or any other anthelmintic drug cures cancer in people.
While it is true that some established treatments such as chemotherapy can cure certain cancers, the anecdotal accounts of a man who cured his lung cancer with fenbendazole are incorrect and misleading. Moreover, the person who shared his story did not mention that he also took other established cancer treatments in addition to fenbendazole.
In a recent study, we interviewed cancer patients about how they acquired fenbendazole information and the quality of that information. We found that a majority of interviewees heard the fenbendazole cures disease claim from acquaintances or family members. However, the percentage of people who heard this information from TV and YouTube was relatively low. fenbendazole cures cancer