There’s insufficient evidence that the dog wormer ingredient fenbendazole can cure cancer. It appears to suppress the growth of cancer cells in a laboratory dish or in mice by blocking the formation of microtubules, which provide structure and shape to all cells. There are already established treatments that work the same way, including a number of chemotherapy drugs.
In addition, in vitro experiments comparing the growth of tumors treated with different doses of fenbendazole or other anthelmintics found that the drug slows the rate at which cancer cells grow and multiply. However, these studies didn’t test if the fenbendazole would also reduce radiation-induced tumor growth.
Our survey asked patients where they first heard the story about Joe Tippens and fenbendazole. Most had seen it on TV or YouTube (B, J, L, and P). A few had heard about it from an acquaintance or family member, but these were the least common sources of information (C, N, U).
A number of patients contacted us to report that their own cancer went into remission after they began taking fenbendazole. However, these reports were anecdotal and weren’t independently verified. We know from other research that the anecdotal stories may not be representative of all people with cancer. And we don’t know whether fenbendazole is responsible for the anecdotes of remission, since it wasn’t the only treatment that the patients were using. The cancers in these patients might have been cured by conventional cancer treatments, or they could have had other causes of remission that aren’t being accounted for. fenbendazole cancer