Ivermectin vs Mebendazole vs Fenbendazole for Cancer: The Complete Evidence Guide (2026)
OneDayMD Evidence Guide · Cancer & Repurposed Medicines A one-stop review of the laboratory research, human clinical studies, patient stories, commonly discussed protocols, safety concerns and primary references for three antiparasitic medicines that have attracted attention as possible cancer treatments. Updated: 13 October 2026 · Editorial review: OneDayMD Editorial Team · Scope: Evidence appraisal and source navigation, not an individualized treatment plan. Important medical safety note Ivermectin, mebendazole and fenbendazole are not interchangeable, and none is an established treatment for cancer. Ivermectin and mebendazole have approved uses for certain parasitic infections in humans; fenbendazole is a veterinary medicine and is not approved by the US FDA for human use. The American Society of Clinical Oncology (ASCO) advised in June 2026 that ivermectin and fenbendazole should not be used to treat cancer—or as an adjunct to established cancer...