Ivermectin for Cancer: Dr. William Makis Protocol Explained (2026 Guide)
Contents
- Who Is Dr. William Makis?
- How Ivermectin May Work Against Cancer
- The Core Protocols (2025–2026)
- What the Research Actually Shows
- Reported Patient Outcomes
- Risks, Side Effects & Drug Interactions
- How to Access Ivermectin Safely
- Frequently Asked Questions
- Key Takeaways
1. Who Is Dr. William Makis?
He shares patient cases and dosing guidance through his Substack publication and on X (formerly Twitter, @MakisMD). His approach draws from the growing body of preclinical research on ivermectin's potential anti-tumor mechanisms, as well as an emerging set of real-world observational reports.
Important Context:
2. How Ivermectin May Work Against Cancer
Ivermectin was developed as an antiparasitic drug and has a well-established safety record at standard doses. Researchers have identified several mechanisms by which it may interfere with cancer cell biology:- Microtubule disruptionBlocks the structural scaffolding cancer cells need to dividePreclinical
- P-glycoprotein inhibitionMay reduce drug resistance in tumors, potentially making other treatments more effectivePreclinical
- WNT/β-catenin pathway suppressionInterferes with a signaling pathway involved in cancer stem cell survival and tumor growthPreclinical
- Mitochondrial dysfunction in tumorsSelectively impairs energy production in cancer cells, which rely heavily on mitochondrial metabolismEarly/in vitro
- Immune modulationMay enhance the body's anti-tumor immune response, though this mechanism is the least well-characterisedTheoretical
3. The Core Protocols (2025–2026)
The following protocols are based on Dr. Makis's publicly shared guidance as of early 2026. These are presented for informational purposes. None of these should be self-administered. Dosages, combinations, and duration must be individualized by a physician with access to your labs, imaging, and medical history.General Protocol Rules (Per Dr. Makis)
- Take ivermectin with a high-fat meal to significantly improve absorption
- Use pharmaceutical-grade 12 mg human tablets only — not veterinary formulations
- Monitor liver and kidney function every 4–6 weeks
- Intermittent fasting or a ketogenic diet is recommended alongside for metabolic synergy
- Topical DMSO application over accessible tumor sites is used by some patients.
4. What the Research Actually Shows
It is important for patients and caregivers to understand the current state of evidence — both its promise and its limitations.- Juarez et al. (2020) — 28 Cancer Cell LinesPreclinical
Ivermectin showed anti-tumor activity across multiple cancer types at 2 mg/kg equivalent doses in vitro. Most responsive: ovarian, breast, glioblastoma, lung, and colon cancers.
- Mebendazole RCT — Stage 4 Colorectal Cancer (Life Sciences, 2022)Phase 2 RCT
Adding mebendazole to standard chemo improved 12-week overall response rate (65% vs 10%) and progression-free survival. This is the strongest human trial in this space.
- EClinicalMedicine (2022) — Mebendazole + Temozolomide in Brain CancerPhase 1
Encouraging safety and signal data in high-grade glioma. Not powered for efficacy conclusions, but tolerability was acceptable.
- Hulscher et al. (April 2026) — 197-Patient Observational CohortObservational
84.4% clinical benefit rate reported: NED 32.8%, tumor regression 15.6%, stable disease 36.1%. No control group; many patients also received conventional treatment. Largest real-world dataset to date, but hypothesis-generating only.
- Cedars-Sinai Phase I/II (ASCO 2025) — Ivermectin + Balstilimab in Metastatic TNBCActive Trial
Ongoing. First prospective human trial combining ivermectin with immunotherapy in breast cancer. Results pending — one of the most important studies to watch in 2026.
5. Reported Patient Outcomes
The following cases were shared publicly via Dr. Makis's Substack and X posts (2024–2026). They are anonymized self-reported accounts. These are anecdotal reports, not clinical trial data. They cannot be used to predict outcomes for any individual patient, and they have not been independently verified.
We include them here because they are part of the public discussion — but we urge readers to weigh them appropriately, as case selection bias (reporting only successes) is a significant concern with this type of evidence.
53-year-old woman, Stage 2 TNBC (7.8 cm tumor) — Reported cancer-free after 7 months (December 2024–July 2025)
Cannot confirm: concurrent treatments, staging accuracy, verification of NED status
58-year-old, Recurrent Stage 4 Kidney Cancer — Reported dying tumors within 10 weeks
Tumor dying ≠ remission. Definition of outcome not independently verified.
70-year-old man, Stage 4 Lymphoma — Reported complete remission in 2.5 months
Lymphoma response rates vary widely; spontaneous remission is also documented in some lymphoma types.
39-year-old woman, Stage 4 Colon with liver mets — CEA marker dropped from 441 to 21.9 over 4 months
CEA reduction is meaningful and measurable, though not confirmed by imaging in this report.
83-year-old, Stage 3 Follicular Lymphoma — Near-total remission reported at 6 months on 1 mg/kg/day
Follicular lymphoma is naturally indolent; watchful waiting alone can produce remission. Confounding is possible.
6. Risks, Side Effects & Drug Interactions
- Neurotoxicity: High-dose ivermectin can cross the blood-brain barrier, particularly in patients with certain genetic variants (ABCB1/P-glycoprotein mutations). Symptoms can include dizziness, confusion, vision changes, or seizures.
- Hepatotoxicity: Liver enzyme elevation is possible, especially when combined with high-dose benzimidazoles. Liver function tests every 4–6 weeks are essential.
- Drug interactions: Ivermectin interacts with warfarin, certain immunosuppressants, CNS depressants, and CYP3A4-metabolized drugs (including many chemotherapy agents). Full medication review is mandatory.
- GI side effects: Nausea, diarrhea, and abdominal discomfort are reported in approximately 25% of patients at high doses, per the Hulscher et al. observational study.
- Unknown long-term safety: There is no long-term human safety data for continuous high-dose ivermectin (months to years). Claims that 2 mg/kg/day is "extremely safe" are not supported by completed long-term studies.
- Delay of proven treatment: For patients with cancers that have well-established effective treatments (e.g., early-stage breast cancer, certain lymphomas, testicular cancer), delaying conventional therapy to pursue repurposed drugs carries significant risk.
Monitoring Recommended
Any physician supervising this protocol should track: complete blood count (CBC), comprehensive metabolic panel (CMP) including liver and kidney function, tumor markers where applicable, and imaging at regular intervals. Any symptom of neurotoxicity requires immediate dose reduction or cessation.
7. How to Access Ivermectin Safely
Quality and sourcing matter significantly. Veterinary-grade ivermectin formulations (pastes, liquids) have inconsistent concentrations and are not designed for human pharmacokinetics. For anyone considering this protocol, pharmaceutical-grade human tablets are the only appropriate form, and a physician prescription is the appropriate access route.
Ivermectin + Mebendazole — Physician-Prescribed Access
The Wellness Company offers a physician-prescribed, pharmacy-compounded ivermectin and mebendazole formula — reviewed by Dr. Peter McCullough. Standardized dosing (25 mg ivermectin + 250 mg mebendazole), quality-tested, and dispensed through US-licensed compounding pharmacies.
View Ivermectin + Mebendazole Formula →⚠ Affiliate link. This is not a replacement for oncology care. Consult your physician before use. Individual results vary. This product is not FDA-approved to treat cancer.
8. Frequently Asked Questions
Can I take ivermectin alongside my chemotherapy?Potentially, but only under physician supervision. Ivermectin interacts with several chemotherapy drugs via the CYP3A4 pathway. Some combinations (like with balstilimab, tested at Cedars-Sinai) appear to be under active study. Do not add ivermectin to your regimen without telling your oncologist, as it may affect drug levels and safety.
Key Takeaways
Ivermectin's anti-cancer potential is a legitimate area of scientific interest, supported by preclinical data and some early human studies — particularly for mebendazole in colorectal cancer. It is not an established cancer treatment, and the gap between promising lab results and proven clinical benefit is significant and not yet bridged.
Dr. Makis has made this space more visible and has given hope to many patients who feel conventional medicine has run out of options. His case reports are numerous and some are striking. But hope must be held alongside honesty: these are not controlled data, outcomes may be influenced by concurrent conventional treatment, and failures are underreported.
For cancer patients considering this path: Work with a physician. Monitor your labs. Do not abandon effective conventional treatments. Understand the difference between what the evidence shows and what it suggests. Ask hard questions — of your oncologist and of advocates for repurposed drugs alike.
References & Further Reading
- Juarez M et al. (2020). Antitumor effects of ivermectin at clinically feasible concentrations support its clinical development as a repositioned cancer drug. PLOS ONE.
- Elayapillai SP et al. (2021). Ivermectin inhibits growth and induces apoptosis of human ovarian cancer cells. International Journal of Oncology.
- Pinto-DÃez C et al. (2022). Mebendazole plus FOLFOX4/bevacizumab in Stage 4 colorectal cancer. Life Sciences. doi:10.1016/j.lfs.2022.120522
- Sepulveda-Arias JC et al. (2022). Mebendazole + temozolomide in high-grade glioma. EClinicalMedicine. PubMed
- Hulscher et al. (April 2026). Real-World Clinical Outcomes of Ivermectin and Mebendazole in Cancer — Observational Cohort (197 patients). Preprint/publication.
- Yuan Yuan et al. (ASCO 2025). Phase I/II: Ivermectin + balstilimab in metastatic triple-negative breast cancer. Cedars-Sinai Medical Center.
- Makis W. Substack @MakisMD — Protocol updates and patient case reports (2023–2026).

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