# RETRACTED: Fenbendazole as an anticancer agent? A case series of self-administration in three patients

Source: https://onco.cc/key-papers/paper-makis-fenbendazole-case-series-retracted-2025/  
OnCo record `paper-makis-fenbendazole-case-series-retracted-2025` (Key paper). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

A 2025 report of three patients said to have gone into remission on a dog dewormer was retracted by the journal in January 2026. It should not be cited as evidence.

## Summary

The paper reported three patients with advanced breast cancer, prostate cancer and melanoma, two said to have achieved complete remission and one near-complete remission after adding fenbendazole to other therapies excluding chemotherapy, with no adverse effects (Makis case series 2025, retracted). The journal published a retraction statement on 21 January 2026 (Retraction notice 2026).

## Fields

- Kind: Key paper
- Last checked: 2026-09-24
- Journal: Case Reports in Oncology
- Year: 2025
- DOI: 10.1159/000546362
- Authors: Makis W, Baghli I, Martinez P.
- Findings: Retracted 21 January 2026; the claims of remission no longer stand in the scholarly record.
- What it means: This paper circulates widely online. Anyone quoting it should know that the journal has withdrawn it.
- Caveats: Retracted publication; the retraction notice (PMID 41574240) is indexed on PubMed.

## Sources

- Makis case series 2025, retracted: https://doi.org/10.1159/000546362
- Retraction notice 2026: https://doi.org/10.1159/000549387
- PubMed: https://pubmed.ncbi.nlm.nih.gov/40605964/
- Retraction notice on PubMed: https://pubmed.ncbi.nlm.nih.gov/41574240/

## Connected records

- technologies: [Fenbendazole, ivermectin and other internet 'repurposed cures'](https://onco.cc/technologies/fenbendazole-ivermectin-repurposing-claims/)
- drugs: [Fenbendazole (veterinary anthelmintic)](https://onco.cc/drugs/fenbendazole/)
- bottlenecks: [Misinformation and unproven therapies](https://onco.cc/bottlenecks/b-misinformation/)

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