Fenbendazole, Ivermectin and Mebendazole Breast Cancer Success Stories – 22 Case Reports (2025)
Can Fenbendazole, Ivermectin and Mebendazole play a key role in treating Stage 4 Breast Cancer?
Several peer-reviewed papers and case studies (below) suggest that it
might.
- Ivermectin, Fenbendazole and Mebendazole in Cancer: 2024 Peer-Reviewed Protocol in Cancer
- Ivermectin and Cancer: 15 Anti-cancer Mechanisms of Action
- FENBENDAZOLE and CANCER - 12 Anti-Cancer Mechanisms of Action
- Mebendazole and Triple Negative Breast Cancer with Brain Metastasis
In this article, we examine case studies of fenbendazole, ivermectin and
mebendazole and its possible role as an adjunct treatment in managing breast
cancer. Could these repurposed drugs offer new hope for patients seeking
additional treatment options? Let’s take a closer look.
However, by end of February, the cancer had progressed to the liver and her Oncologist switched from Kisqali to Capecitabine 1500mg.
RESULTS at end of April 2025:
"We had our appointment with the oncologist today who shared with us XXX's "miraculous" (her words) PET scan results"
My Take...
"I don’t always get nice images sent to me, but in this case, I did. This PET scan improvement is impressive! Especially considering the short time frame. Don't forget, this breast cancer patient was on Kisqali, the best that modern Oncology could offer this patient. The cost? Up to $15,000 a month. We completely blew Kisqali out of the water. A useless drug that brings in $15,000 a month from every cancer patient that uses it. The cost of Ivermectin and Fenbendazole? About $200-$300 a month."
Case 21: 56 year old Illinois woman with Stage 4 Breast cancer and spread to bones
Dr. William Makis shared on X (Twitter) in May 2025:
IVERMECTIN and FENBENDAZOLE Testimonial - 56 year old Illinois woman with Stage 4 Breast Cancer to bones has excellent response! STORY: 56 year old Illinois woman was diagnosed with Stage 4 Breast cancer to bones.
PET/CT confirmed ongoing healing of bone metastases !
Case 20: 35 year old American woman with Stage 4 Breast cancer metastatic to lymph nodes and bones
Dr. William Makis shared on X (Twitter) in April 2025:
IVERMECTIN and MEBENDAZOLE Testimonial - 35 year old American woman with Stage 4 Breast cancer metastatic to lymph nodes and bones sees dramatic improvement! 35 years old with Stage 4 is a difficult battle but we go to war against cancer with no hesitation! STORY: 35 year old American woman was diagnosed with Stage 4 Breast Cancer metastatic to lymph nodes and multiple bones. She came to me in mid January 2025.
We started:
Breast Cancer Success Stories
Case 22: 49 year old Australian woman with Stage 4 Breast Cancer
to liver and bones who failed Kisqali
Dr. William Makis shared on X (Twitter) in May 2025:
"IVERMECTIN and FENBENDAZOLE Testimonial - 49 year old Australian woman with Stage 4 Breast Cancer to liver and bones who failed Kisqali, has full metabolic response on PET after only 6 weeks! Incredible Cancer success story from Australia!
I told you I have patients from around the world! STORY: 49 year old Australian woman with Stage 4 Breast Cancer metastatic to bones (sternum, ribs) on Letrozole and Kisqali, reached out to me
We started in mid February:
- Ivermectin 1mg/kg/day
- Fenbendazole 444mg/day increasing to 1554mg/day
RESULTS at end of April 2025:
"We had our appointment with the oncologist today who shared with us XXX's "miraculous" (her words) PET scan results"
"As you can see 6 weeks ago, before starting your protocol, she had extensive metastasis to her lymph bones and liver."
"Today we were told she has had a "complete metabolic response" with no detectable cancer anywhere in her body"
My favorite part
"We thank you once again for the tireless commitment you have provided to XXX and the other countless cancer suffer(er)s you help on a daily basis"
"I don’t always get nice images sent to me, but in this case, I did. This PET scan improvement is impressive! Especially considering the short time frame. Don't forget, this breast cancer patient was on Kisqali, the best that modern Oncology could offer this patient. The cost? Up to $15,000 a month. We completely blew Kisqali out of the water. A useless drug that brings in $15,000 a month from every cancer patient that uses it. The cost of Ivermectin and Fenbendazole? About $200-$300 a month."
Case 21: 56 year old Illinois woman with Stage 4 Breast cancer and spread to bones
Dr. William Makis shared on X (Twitter) in May 2025:
IVERMECTIN and FENBENDAZOLE Testimonial - 56 year old Illinois woman with Stage 4 Breast Cancer to bones has excellent response! STORY: 56 year old Illinois woman was diagnosed with Stage 4 Breast cancer to bones.
We started in late January 2025:
- Ivermectin 1.5mg/kg/day
- Fenbendazole 1000mg/day
Oncologist started Letrozole 2.5mg/day in mid Jan.2025 and Kisqali (targeted therapy) in beginning of March 2025, that had to be stopped due to side effects.
RESULTS (after 2 months): From patient: "I wanted to share some amazing updates on blood markers. The CA 15-3 has dropped by 74% and CA 27-29 has dropped by 73.5% in 2 months!"
CA 15-3: 335 to 88.6
CA 27-29: 764 to 203
Case 20: 35 year old American woman with Stage 4 Breast cancer metastatic to lymph nodes and bones
Dr. William Makis shared on X (Twitter) in April 2025:
IVERMECTIN and MEBENDAZOLE Testimonial - 35 year old American woman with Stage 4 Breast cancer metastatic to lymph nodes and bones sees dramatic improvement! 35 years old with Stage 4 is a difficult battle but we go to war against cancer with no hesitation! STORY: 35 year old American woman was diagnosed with Stage 4 Breast Cancer metastatic to lymph nodes and multiple bones. She came to me in mid January 2025.
- Ivermectin 1.5mg/kg/day
- Mebendazole 1000mg/day
- Cancer Blood marker CA15.3 dropped from 50.1 to 26.9
- SIGNATERA (circulating tumor DNA) dropped from 5.1 to 0.07 (!!)
- PET Scan showed decreased metabolic activity in all bone metastases and all lymph node metastases.
The only issue we ran into was an MRI that saw some "larger" bone lesions, which were almost certainly areas of bone healing in previously invisible areas of cancer. This is one of the major advantages that PET/CT has over MRI or CT - it is able to identify “healed bone metastases” which look “larger” due to sclerosis (bone healing) but have lower or no metabolic activity due to cancer cell killing. In this case, we see a dramatic response after only 2.5 months on Ivermectin & Mebendazole! Oncologists have never seen results like this. Sometimes, they'll even admit it.
Case 19: 61-year-old Florida woman with Stage 4 Breast
Cancer metastatic to lungs, liver, and bones
Dr. William Makis shared on X (Twitter) in April 2025:
Ivermectin and Mebendazole Testimonial - 61 year old Florida woman with Stage 4 Breast Cancer metastatic to lungs, liver, and bones, has dramatic response in 2 months - 83% tumor shrinkage!
Ivermectin and Mebendazole Testimonial - 61 year old Florida woman with Stage 4 Breast Cancer metastatic to lungs, liver, and bones, has dramatic response in 2 months - 83% tumor shrinkage!
Breast cancer is the most common cancer at my Ivermectin
Cancer Clinic. We have so many successes!!
STORY:
61 year old Florida woman was diagnosed with Stage 4 Breast Cancer metastatic to lungs, liver, and bones. Patient started Ivermectin and Fenbendazole 444mg at end of December 2024 but the breast mass continued to grow.The patient then came to me for assistance.
Sometimes you need some guidance from someone with expertise.
Within 2 months, the breast tumor shrunk from 8.0x7.0cm to 3.5x2.7cm (83% tumor volume shrinkage!!)
Oncologist: “He is so impressed with her treatment...not aware of the ivermectin and mebendazole"
"We are grateful to you for your advice and support. We hope and believe she will make the mass on her breast disappear completely"
"I follow closely on X your case with Alberta health and I root for you!"
Imagine an 8cm tumor shrinking down to 3.5cm in barely two months with Ivermectin & Fenbendazole.
Case 18: 57 year old California female with Stage 4 Breast Cancer and progressing metastases
Dr William Makis updated on X (Twitter) in April 2025:
IVERMECTIN and FENBENDAZOLE Testimonial - 57 year old
California woman with Stage 4 Breast Cancer goes from
progressing metastases to "CANCER FREE" in 3 months!
57 year old Stage 4 Breast Cancer patient with metastatic
lymph nodes in the thorax and abdomen.
In August 2024,
PET/CT showed progressive metastases that were growing quite
quickly.
She reached out to me in August 2024 and was one of the first
patients in my Ivermectin Cancer Clinic!
She started Ivermectin 45mg/day and Fenbendazole 444mg/day in
mid December, 2024 (her Ivermectin order had been confiscated
by some evil individuals, so her start was delayed)
On Feb.25, 2025, PET/CT showed no evidence of disease. All
the metastatic lymph nodes were gone. That’s less than 3
months.
When a tumor is very responsive to Ivermectin and
Fenbendazole, the results can be absolutely jaw dropping.
From the patient:
"I started your Ivermectin and Fenbendazole protocol in
December 2024, along with targeted therapy Enhertu. I now have
"no evidence of disease"!" (email March 20, 2025)
“My oncologist is very open to me staying on ivermectin,
actually told me to keep taking it, knows it helps chemo work
better, and said, “absolutely” when I asked him if he would
take it if he had cancer.”
The CEA dropped from 25 to 1.4 from the moment she started taking Ivermectin and Fenbendazole.
Case 17: 51 year old American Woman shrinks her Grade 2, Stage 2 Breast cancer 99% prior to surgery
Dr. William Makis shared on X (Twitter) in April 2025:
IVERMECTIN and MEBENDAZOLE Testimonial - 51 year old American Woman shrinks her Breast cancer 99% prior to surgery!! Breast surgeon hasn't seen this in 30 years of practice! Most cancer patients come to me at Stage 4, once they've exhausted many conventional treatment options. That's just how life is... But what happens if a cancer patient comes to my world leading Ivermectin Cancer Clinic at an early stage? Let's find out...
STORY: 51 year old American woman (wife of a physician) was diagnosed with a 2.1cm Breast Cancer in the left breast, Grade 2, Stage 2
We started:
- Ivermectin 1.5mg/kg/day
- Mebendazole 1000mg/day
From the patient:
“My Breast Surgeon said she had never seen anything like it in her 30 years of practice!”
"My situation is so unique, they are planning to send it to the Cleveland or Mayo Clinic"
So what's my experience with early stage tumors? Ivermectin, Fenbendazole and Mebendazole are often capable of shrinking tumors before surgery. In this case, the tumor shrank 99%. Some of my patients have avoided surgery entirely.
Case 16: 83-yr-old with Metastatic Breast Cancer
Fenbendazole Testimonial. Full case report: https://www.onedaymd.com/2025/05/metastatic-breast-cancer-age-83.html.
Case 16: 83-yr-old with Metastatic Breast Cancer
Fenbendazole Testimonial. Full case report: https://www.onedaymd.com/2025/05/metastatic-breast-cancer-age-83.html.
This Case Report is from a 45 year old woman with metastatic Stage III triple-negative breast cancer that had spread to nearby lymph nodes. According to the Cleveland Clinic, 15% of cases of invasive breast cancer are triple-negative breast cancer (TBNC), which is considered a dangerous subtype of the disease.
Unlike most breast cancers, triple-negative breast cancer cells
don’t have receptors for estrogen and progesterone. Because this
type of breast cancer doesn’t have the hormone receptors used by
the current drugs to attack most breast cancers, the prognosis is
very poor using traditional treatments like chemotherapy. Recall
that receptors are molecules on cells’ surfaces that determine
what substances can attach to cells and affect what the cells do.
Triple-negative breast cancer cells don’t have these receptors, so
the traditional chemotherapies used to target breast cancer cells
by their hormone receptors don’t work. So there is a dire need to
find treatments that actually work.
The cancer had spread to the nearby lymph nodes and was causing the skin on my breast to discolor. I took Safe-Guard (fenbendazole) for 14 weeks, started the 3 days on, 4 days off protocol that I read about for about the first 7 weeks. Then increased from 1 box a week (each box has 3 packets), to a box and a half (about 5 packets of 222 mg each) per week.
The first thing I noticed was my skin clearing up, the small spots on my breast disappeared at about 11 weeks after starting fenbendazole. This was the 222mg dose. No side effects at all.
My advice, take fenben, and don't stop. At least not until it's gone. I’ve been cancer-free for almost 16 months. Best of wishes to all of you!
- L. K. T., Tucson AZ, December 5, 2023
Questions and Answers
Q: Are there any side effects from Fenbendazole?
A: No.
Q: Did you do any other treatments?
A: No.
Q: Did you tell your doctor you were using Fenbendazole?
A: No.
Q: What is your weight?
A: 5’6″ and 145 pounds.
Q: Did you receive any booster shots or COVID-19 shots?
A: None.
Case 14: 80-year-old retired nurse with Stage 4 triple negative breast cancer (TNBC)* with lung metastases
Ivermectin, Fenbendazole & Mebendazole Testimonial. (Source: https://t.co/ZTLcEFYc0E)
Description: Shared on March 30, 2025, by @MakisMD , this discusses an 80-year-old retired nurse with Stage 4 triple negative breast cancer with lung metastases. She reportedly became cancer-free after a year on a protocol including fenbendazole.
*Using SEER 5-year survival
statistics: Triple-Negative Breast Cancer (TNBC): ~12-20% 5-year survival in Stage III vs. multiple
anecdotal remissions in fenbendazole group shared in this
case series article.
Raleigh Williams updated on X (Twitter) in March 2025:
"The scan on the right is from November and showed stage IV breast cancer in my wife’s spine. The scan on the left is from yesterday and shows “No Evidence of Disease.” Following every protocol from the oncologist left my wife exhausted and suicidal (plus the cancer came back anyway) so we started doing our own research and found a protocol that felt good to us and it has worked thus far. The doctor interpreting the PET scan was shocked that the cancer shrunk given the fact that she isn’t on any conventional chemotherapy protocol at the moment."

We get our Ivermectin here (yes it's for horses, we have some friends that get their
from a compound pharmacy which we haven't done yet.) And the
Fenbendazole here. We've had a lot of questions on dosing and frequency. Dr. Makis
has recommended 1mg/kg/day for Ivermectin and 444 mg/day for Fenbendazole on his X account and we have followed that protocol.
Read about their current protocol HERE.
Case 12: 75 year old patient had breast cancer 10 years ago with 5 new breast masses
Dr. William Makis shared on X (Twitter) in March 2025:
IVERMECTIN and MEBENDAZOLE Testimonial - 75 year old patient with Breast cancer 10 years ago, has 5 new breast masses. They almost completely disappear after 4 months on protocol! Some of the results I get are absolutely jaw dropping. This one is a "must see". STORY: 75 year old patient had breast cancer 10 years ago recently developed multiple breast masses and neck lymph nodes up to 3.6cm. "I do not wish to be treated by the traditional medical system, after a past breast cancer episode and also learning from the COVID pandemic" Fair enough.
Patient: "The comparison is almost unbelievable!"
Impression:
"Excellent treatment response with interval left mastectomy as well as complete resolution of FDG avid bone metastasis and bilateral hilar FDG avid lymph nodes that were present on prior exam. No findings to suggest active malignant disease at this time".


"Diagnosed Stage 4 metastatic breast cancer in November of 2022.
Started Fenbendazole right away and also switch it up one week a
month with ivermectin. I’ve been cancer free for over a year!"
I share these to show what optimizing Cancer Treatment looks like
(especially in Stage 4 Cancer patients). This is cutting edge work
not being done at any Cancer Centre in the United States or
Canada.
Case 7: 70 year old Stage 4 Breast Cancer patient with bone and brain metastases (December 2024)
Dr William Makis shared on X/Twitter:
IVERMECTIN, FENBENDAZOLE and LACTOFERRIN Testimonial - (SPAIN) 70s year old Stage 4 Breast Cancer patient with bone and brain metastases sees dramatic improvements in Quality of Life! 70s year old Stage 4 Breast Cancer patient with bone and brain metastases. Family reached out to me.
Sep.6, 2024: "Just found out that I am Cancer Free today!!"


A 69-year-old female was diagnosed with invasive breast cancer in October 2015. She underwent left breast partial mastectomy, but bone metastases and pleural dissemination appeared (Figure 1). She responded to chemo-endocrine therapy, but it soon became less effective, and intolerable side effects appeared. We gave up conventional therapy and started treatment with dichloroacetate, omeprazole, and tamoxifen from October 2021: weekly use of three tablets of 333 mg dichloroacetate per day (on Day 1), three tablets of 40 mg omeprazole per day (on Day 1), along with a tablet of 20 mg tamoxifen every day. This relieved her symptoms (bone pain, shortness of breath, and general fatigue) instantly but not completely. Hence, we added a tablet of 12 mg ivermectin per day (on Day 1), which stabilized pleural effusion and induced tumor marker reduction (CEA or carcinoembryonic antigen), which went down from 12.9 to 7.3, and cancer antigen 15-3 (CA15-3), which went down from 302.3 to 229.4 in three months).
Condition: Stage 4 ER+PR+HER2- Metastatic Breast Cancer to bones
A friend told me about the Joe Tippens Protocol and ivermectin the day after I got my diagnosis for a third bout with breast cancer. I started both immediately. I saw my oncologist a week later. She added Faslodex, Kisqali, and Femara. She supported me added the JTP and the ivermectin. In 8 weeks I was in remission as measured by my CA2729. At week 11, a PET scan showed NED.
Which of the protocol components did you use? Fenbendazole , Curcumin, CBD/ cannabis Oil, Berberine, Other
Other supplements used: 12 mg ivermectin daily
Which conventional treatments did you do? Hormone therapy
Case 2: Stage 4 metastatic breast cancer Mets to lymph nodes, liver and bone in my upper shoulder (March, 2022)
In 2018, I experienced heavy fatigue most of the time. It almost felt as if I got weaker and weaker as the days went by. I felt this lump on the side of my breast and got it checked out right away. I received the news that I have stage 4 metastatic breast cancer Mets to lymph nodes, liver and bone in my upper shoulder.
Case 1: Stage 4 breast cancer with Mets to lymph nodes, bones, and bone marrow (June, 2021)
Three years ago I received a lumpectomy, which is when the cancer gets removed from a part of the breast tissue. The surgery was successful and I was declared free of any cancer back then, till about two years later I was diagnosed with stage 4 breast cancer with Mets to lymph nodes, bones, and bone marrow. It basically spread all over my body. This was terrifying at the time and I felt there was no way to win this battle.
With no options left, I decided to go onto the Joe Tippens protocol, and followed it for a whole good year before I received my PET scan results stating that I am cancer free! And to make this even more insane to think of – I wasn’t receiving any form of chemo or radiation ever during the recovery process, the only medication I consumed alongside following this protocol was hormone blockers.
I however got very sick in the beginning stages of using this protocol and started using Serrapeptase (an enzyme) along with it, which seems to have taken all side effects away. I gained my strength back and my blood tests were normalized on every account. After being only 6 months on the protocol more than half of my cancer disappeared. Here is a brief idea of what my protocol looked like:
Video Testimonial of Breast Cancer (Triple Negative Breast Cancer) Recovery with Fenbendazole Protocol
.@RobertKennedyJr Fenbendazole and Ivermectin Responsible In Cancer Success Story.
— 🦅 Eagle Wings 🦅 (@CRRJA5) April 23, 2025
The testimonial you are about to watch is from an individual who bravely shared her experiences in the hope of inspiring and uplifting others. pic.twitter.com/wwCcpCADnk
Dr. William Makis shared on X (Twitter) in March 2025:
IVERMECTIN and MEBENDAZOLE Testimonial - 75 year old patient with Breast cancer 10 years ago, has 5 new breast masses. They almost completely disappear after 4 months on protocol! Some of the results I get are absolutely jaw dropping. This one is a "must see". STORY: 75 year old patient had breast cancer 10 years ago recently developed multiple breast masses and neck lymph nodes up to 3.6cm. "I do not wish to be treated by the traditional medical system, after a past breast cancer episode and also learning from the COVID pandemic" Fair enough.
We started a protocol in October 2024:
RESULTS after 4 months on the Makis Ivermectin Cancer Clinic Protocol: - Ivermectin 1mg/kg/day
- Mebendazole 1000mg/day
Patient: "The comparison is almost unbelievable!"
1.6cm right breast lesion - gone
1.2cm right breast lesion - now 0.9cm
3.6x2.9cm left breast lesion, possible intramammary lymph node - gone
1.7cm left breast lesion - gone 2.9x2.3cm
left breast lesion - gone
Patient: “in addition to these breast improvements, five big lumps in my neck have disappeared!” No biopsy. No surgery. No chemo. No radiation. No other explanation. These breast masses weren’t that small either! When I post these testimonials and the patient also took chemo, many people like to claim the chemo did all the work (and Ivermectin doesn't work). There was no chemo in this case. No radiation. No other treatment of any kind.
Case 11: 35 year old woman with Stage 4 Breast Cancer
(triple positive) to lungs and bones
Dr. William Makis shared on X (Twitter) in February 2025:
IVERMECTIN and MEBENDAZOLE Testimonial with TURBO CANCER
FROM THE BRINK: 35 year old Stage 4 Breast Turbo Cancer patient
with "little time left to live" to "NO ACTIVE DISEASE" - the
miracle PET/CT scan at 6 months!
This was one of my
first Ivermectin Clinic patients: 35 years old US woman with Stage
4 Breast Cancer to lungs and bones
Initially diagnosed in Nov 2023 with triple positive breast
cancer.
"We suspect that she may have a COVID-19 vaccine induced turbo
cancer as she received both doses of the vaccine and a booster.
Her husband, 36 years old, who received the same vaccines as her
at the same time, was diagnosed with testicular cancer"
2024: “We were recently informed that her cancer is resistant to
treatment and very aggressive". It is confirmed to have
metastasized to her lungs, sternum and spine”
“Her Oncologists have informed her that she has little time left
and they are not open to trying any of the drugs you have
mentioned like Ivermectin”.
When I started my cancer clinic, I was very aggressive in my
treatment approach. I still am. We started in mid August 2024.
- Ivermectin 1mg/kg/day escalating dose to 2mg/kg/day
- Mebendazole 1500mg/day
Why am I aggressive in my dosing? Have a look at the follow-up
PET/CT scan done 6 months into Ivermectin/Mebendazole.
"Excellent treatment response with interval left mastectomy as well as complete resolution of FDG avid bone metastasis and bilateral hilar FDG avid lymph nodes that were present on prior exam. No findings to suggest active malignant disease at this time".


Case 10: Stage 4 metastatic breast cancer (Jan 2025
Update)
Carla shared on X/Twitter:
Case 9: IVERMECTIN and MEBENDAZOLE* Testimonial - 69 year
old USA Stage 4 Breast Cancer patient with metastases to liver
and bones on Enhertu (December 2024)
Dr William Makis shared on X/Twitter:
IVERMECTIN and MEBENDAZOLE* Testimonial - 69 year old USA Stage
4 Breast Cancer patient with metastases to liver and bones on
Enhertu
69 year old woman with Stage 4 Breast Cancer to liver and
bones
Had 2 treatments of Enhertu with Ivermectin 36mg and
Mebendazole 500mg a day for 3 weeks
CEA dropped from 148.4 to 83.9 (that’s a 43% drop!!)
What is Enhertu?
"Enhertu, generically known as fam-trastuzumab deruxtecan-nxki,
is an antibody-drug conjugate (ADC) designed for targeted cancer
therapy, particularly for cancers expressing the HER2 protein on
their cell surface"
Grok will tell you that it wasn't Enhertu that did this:
"In summary, while there is some indication from patient
experiences that Enhertu might lead to reduced CEA levels in
some individuals, this is not a guaranteed or direct effect of
the drug." That 43% drop in tumor marker CEA was due to the
Ivermectin and Mebendazole addition to the treatment
regimen.
*Note: Although technically mebendazole is not the same as
fenbendazole, both mebendazole and fenbendazole are part of a
larger group of drugs known as benzimidazole*, which are
anthelmintic drugs (i.e., drugs that kill parasitic
worms).
While most of the pre-clinical research uses mebendazole, probably because it is the FDA-approved-for-humans form of fenbendazole, virtually most of the self-treating clinical reports involve the use of fenbendazole.

Case 8: Stage 4 Breast Cancer
*The class of drugs known as benzimidazoles includes
fenbendazole, mebendazole, albendazole and
flubendazole.
Fenbendazole and mebendazole are similar in that they both
eliminate parasitic worms, but there is a difference.
Mebendazole is approved for human consumption by the FDA, while
fenbendazole is only approved for veterinary use and has not
been approved for human use.
Mebendazole is the form that is approved for human use
while fenbendazole is approved for veterinary use. The main
difference is the cost. Mebendazole is expensive ~$450 per
pill (two pills of mebendazole cost just $4 in the UK.),
while fenbendazole is inexpensive ~48 cents per 222 mg free
powder dose (Williams, 2019). Albendazole is the form used
to treat intestinal parasites in India and these cost 2
cents per pill.
While most of the pre-clinical research uses mebendazole, probably because it is the FDA-approved-for-humans form of fenbendazole, virtually most of the self-treating clinical reports involve the use of fenbendazole.

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source: https://substack.com/home/post/p-155091883 |
Case 7: 70 year old Stage 4 Breast Cancer patient with bone and brain metastases (December 2024)
Dr William Makis shared on X/Twitter:
IVERMECTIN, FENBENDAZOLE and LACTOFERRIN Testimonial - (SPAIN) 70s year old Stage 4 Breast Cancer patient with bone and brain metastases sees dramatic improvements in Quality of Life! 70s year old Stage 4 Breast Cancer patient with bone and brain metastases. Family reached out to me.
We started a protocol:
“Pain gradually decreasing” (requiring less pain medications
“Starting to get up and walk around the house” - Increased mobilit
“being able to sleep on her side, which she couldn’t do before”
“willing to do things” (improved mood)
“she can get up alone from bed and sofa” (improved strenght)
“blood test results showing good improvements” (improved blood work)
And my favorite:
- Ivermectin 1mg/kg/day
- Fenbendazole 444mg/day 6 days a week
- Lactoferrin 1000mg/day
Sometimes it’s the quality of life improvements you can see right away:
“Pain gradually decreasing” (requiring less pain medications
“Starting to get up and walk around the house” - Increased mobilit
“being able to sleep on her side, which she couldn’t do before”
“willing to do things” (improved mood)
“she can get up alone from bed and sofa” (improved strenght)
“blood test results showing good improvements” (improved blood work)
And my favorite:
Case 6: Anaesthesiologist with Breast Cancer (Last Update:
November 2024)
Katrina’s November 25, 2024 addendum:
Shortly after doing my October 2024 podcast with Dr. Yoho, I again had a return of liver dysfunction symptoms similar to those I had a few months prior with the ivermectin and fenbendazole combination, even though I had reduced doses of both and taken a 2-week break after that episode. My symptoms were primarily severe laryngopharyngeal Reflux, dry coughing, vomiting intermittently after meals, diarrhea, loss of appetite, and significant fatigue.
Miraculously, I got an earlier appointment with Dr. Lucy Kerr in Brazil via telehealth, and she gave me the correct dose of ivermectin to use indefinitely based on my weight - 1.5 mg/kg (Kat weighs 140 pounds or 64 kg. Her new dose of ivermectin is 95 mg. She told me that only 10% of ivermectin is metabolized by the liver, with 90% of its metabolism occurring in the intestine. She is so knowledgeable about this drug, and she said I must stop the fenbendazole immediately and never use it again, as it is too toxic. I was desperately ill last year, and so many websites had papers extolling the anti-cancer activity of fenbendazole, but as with so much in the complementary alternative cancer world, people are just trying to sell stuff, and nobody really knows what each individual person needs for their cancer. That is why I am becoming increasingly humble and careful and have cut out almost all supplements. I still take vitamin D, and - vitamin A is essential if you are on ivermectin high dose, and of course, magnesium, dandelion tea, green tea, and a keto diet. See the amazing YouTube video interview of Dr. Thomas Seyfried on cancer and diet, and you will understand the crucial importance of diet with a cancer diagnosis. And I do continue PEMF and chlorine dioxide.
Dr. Lucy Kerr is in Brazil and can only be contacted via from the USA via WhatsApp. She does prescribe a lot of supplements, but I think that is because some of the alternative cancer treatments are not available in Brazil as they are in the USA. She is one of the few trustworthy integrative cancer physicians in the world. I know this from how she helped me in 2022. I should have listened to her then and never lowered my ivermectin dose, but I had gotten so swept up in the hype on supplements, etc, for cancer that I did not know what was working for my cancer healing. Just one of the dangers of too many supplements!!
Shortly after doing my October 2024 podcast with Dr. Yoho, I again had a return of liver dysfunction symptoms similar to those I had a few months prior with the ivermectin and fenbendazole combination, even though I had reduced doses of both and taken a 2-week break after that episode. My symptoms were primarily severe laryngopharyngeal Reflux, dry coughing, vomiting intermittently after meals, diarrhea, loss of appetite, and significant fatigue.
Miraculously, I got an earlier appointment with Dr. Lucy Kerr in Brazil via telehealth, and she gave me the correct dose of ivermectin to use indefinitely based on my weight - 1.5 mg/kg (Kat weighs 140 pounds or 64 kg. Her new dose of ivermectin is 95 mg. She told me that only 10% of ivermectin is metabolized by the liver, with 90% of its metabolism occurring in the intestine. She is so knowledgeable about this drug, and she said I must stop the fenbendazole immediately and never use it again, as it is too toxic. I was desperately ill last year, and so many websites had papers extolling the anti-cancer activity of fenbendazole, but as with so much in the complementary alternative cancer world, people are just trying to sell stuff, and nobody really knows what each individual person needs for their cancer. That is why I am becoming increasingly humble and careful and have cut out almost all supplements. I still take vitamin D, and - vitamin A is essential if you are on ivermectin high dose, and of course, magnesium, dandelion tea, green tea, and a keto diet. See the amazing YouTube video interview of Dr. Thomas Seyfried on cancer and diet, and you will understand the crucial importance of diet with a cancer diagnosis. And I do continue PEMF and chlorine dioxide.
Dr. Lucy Kerr is in Brazil and can only be contacted via from the USA via WhatsApp. She does prescribe a lot of supplements, but I think that is because some of the alternative cancer treatments are not available in Brazil as they are in the USA. She is one of the few trustworthy integrative cancer physicians in the world. I know this from how she helped me in 2022. I should have listened to her then and never lowered my ivermectin dose, but I had gotten so swept up in the hype on supplements, etc, for cancer that I did not know what was working for my cancer healing. Just one of the dangers of too many supplements!!
Original Post (Oct 2024)
Level One recommendations
★ Ivermectin is crucial and should be taken with food for proper absorption. I use only the compounded variety, not tablets, because the bioavailability and quality may not be assured with much of what is available online. I use 90 mg capsules from Evergreen Compounding Pharmacy and West Cocoa Pharmacy. These require prescriptions from licensed providers.
Optimal dosing is unknown, but I believe it depends upon your cancer stage. If you are stage 4 or are given only a few months to live, I would consider 1-2 milligrams per kilogram daily. Doses this high must be taken with beta carotene supplementation to avoid eye problems, the main issue with high doses of IVM taken daily for extended periods. I have always responded within a few weeks, and a friend with pancreatic cancer noted decreasing pain within a week. Complete remission may take 4-6 months. IVM must be taken with food for best absorption...
I found a breast cancer lump in my left breast in 2016. I
stupidly allowed my doctor to biopsy the lesion, which broke
the capsule around it. This may have permitted the cancer to
spread to the nodes, making me Stage 2 with three positive
lymph nodes. The doctors had said the lump was too big to do a
lumpectomy. I should have done cryotherapy to treat the nodule
but chose instead to have a bilateral mastectomy with
reconstruction in one procedure to avoid repeated MRIs and
constant worry. After surgery, they recommended tamoxifen,
chemo, and radiation. I refused it all and was treated with
diet, DIM supplements, vitamin D, stress reduction,
psychological counseling, and spiritual work.
In early 2022, I began to have a cough and shortness of breath. My chest x-ray showed a large right pleural effusion (fluid around my lung), and when it was sampled using a needle, it contained malignant breast cancer cells. My scans showed mediastinal lymph nodes (in the chest’s center), a nodule in the right upper lung lobe, and a lymph node in each armpit.
To breathe, I was forced for a time to have the fluid around my lungs extracted with a needle every two weeks. This was despite using hyperbaric oxygen therapy, a detox supplement regimen, and other treatments, including green tea, vitamin C infusions, ozone therapy, high-dose melatonin, green tea capsules, ketogenic diet, infrared sauna, and quantum biofeedback. Quantum biofeedback is an advanced system. It is different from other biofeedback that works on arousal states. Instead, it works on frequencies using a complex computer algorithm program that can be used diagnostically and therapeutically. I also began daily ivermectin (IVM) and beta-carotene supplements.
Within four months of starting IVM, the fluid stopped forming around my lungs. My PET scan six months after beginning ivermectin showed no active cancer in any fluid, no nodule in the lung, and just a couple of lymph nodes that were below the active cancer metabolic threshold.
I then (stupidly) tapered the ivermectin dose to 30 mg twice a week. I was taking so many supplements and foods that I could not tell what was working. The pleural effusion recurred about three to four months after reducing the ivermectin. It was in my left lung this time, and the mediastinal lymph nodes reappeared. I had missed the importance of ivermectin in my overall treatment plan.
In August 2023, I visited the Hope 4 cancer clinic in Cancun, but it was an expensive disaster that did nothing to help me. I again started requiring weekly pleural taps and eventually needed a Pleurex catheter to drain the fluid daily. My left lung was my only normal lung after damage to my right lung in 2022 from the constant fluid and subsequent lung collapse.
From September 2023 until July 2024, I took 120mg of IVM daily plus fenbendazole 444mg daily. Six months later, fluid stopped forming around my left lung. However, I started developing teeth staining, and after about five months, my blood enzymes showed liver dysfunction. After a 10-day break from both medications and restarting them at lower doses, I felt better. My PET/CT scans in March 2024 and July 2024 showed no cancer metabolic activity and no evidence of cancer or lymph nodes anywhere, and my follow-up scans are planned for October 2024. I now take 45mg of ivermectin five days a week, none on the weekend, and fenbendazole 440 mg twice a week.
In early 2022, I began to have a cough and shortness of breath. My chest x-ray showed a large right pleural effusion (fluid around my lung), and when it was sampled using a needle, it contained malignant breast cancer cells. My scans showed mediastinal lymph nodes (in the chest’s center), a nodule in the right upper lung lobe, and a lymph node in each armpit.
To breathe, I was forced for a time to have the fluid around my lungs extracted with a needle every two weeks. This was despite using hyperbaric oxygen therapy, a detox supplement regimen, and other treatments, including green tea, vitamin C infusions, ozone therapy, high-dose melatonin, green tea capsules, ketogenic diet, infrared sauna, and quantum biofeedback. Quantum biofeedback is an advanced system. It is different from other biofeedback that works on arousal states. Instead, it works on frequencies using a complex computer algorithm program that can be used diagnostically and therapeutically. I also began daily ivermectin (IVM) and beta-carotene supplements.
Within four months of starting IVM, the fluid stopped forming around my lungs. My PET scan six months after beginning ivermectin showed no active cancer in any fluid, no nodule in the lung, and just a couple of lymph nodes that were below the active cancer metabolic threshold.
I then (stupidly) tapered the ivermectin dose to 30 mg twice a week. I was taking so many supplements and foods that I could not tell what was working. The pleural effusion recurred about three to four months after reducing the ivermectin. It was in my left lung this time, and the mediastinal lymph nodes reappeared. I had missed the importance of ivermectin in my overall treatment plan.
In August 2023, I visited the Hope 4 cancer clinic in Cancun, but it was an expensive disaster that did nothing to help me. I again started requiring weekly pleural taps and eventually needed a Pleurex catheter to drain the fluid daily. My left lung was my only normal lung after damage to my right lung in 2022 from the constant fluid and subsequent lung collapse.
From September 2023 until July 2024, I took 120mg of IVM daily plus fenbendazole 444mg daily. Six months later, fluid stopped forming around my left lung. However, I started developing teeth staining, and after about five months, my blood enzymes showed liver dysfunction. After a 10-day break from both medications and restarting them at lower doses, I felt better. My PET/CT scans in March 2024 and July 2024 showed no cancer metabolic activity and no evidence of cancer or lymph nodes anywhere, and my follow-up scans are planned for October 2024. I now take 45mg of ivermectin five days a week, none on the weekend, and fenbendazole 440 mg twice a week.
★ Ivermectin is crucial and should be taken with food for proper absorption. I use only the compounded variety, not tablets, because the bioavailability and quality may not be assured with much of what is available online. I use 90 mg capsules from Evergreen Compounding Pharmacy and West Cocoa Pharmacy. These require prescriptions from licensed providers.
Optimal dosing is unknown, but I believe it depends upon your cancer stage. If you are stage 4 or are given only a few months to live, I would consider 1-2 milligrams per kilogram daily. Doses this high must be taken with beta carotene supplementation to avoid eye problems, the main issue with high doses of IVM taken daily for extended periods. I have always responded within a few weeks, and a friend with pancreatic cancer noted decreasing pain within a week. Complete remission may take 4-6 months. IVM must be taken with food for best absorption...
Read More: High Dose IVERMECTIN for Breast Cancer AND TIPS FOR OTHER
CANCERS - DR KATRINA LEWIS
Case 5: Stage 4 Breast Cancer with spread to bones (Last
Update: September 2024)
Description: Shared on September 11, 2024, by @MakisMD, this post
highlights Denise Pane’s experience with metastatic breast cancer
that spread to her bones. After using fenbendazole, she reportedly
became cancer-free, having previously been hospitalized and unable
to walk without assistance.
"I had metastatic breast cancer that spread to my bones. I was in
the hospital most of Jan/Feb of this year. Couldn't walk without
assistance and was in excruciating pain" "I had heard about Fenben
through a friend and decided to finally give it a try" "My markers
were dropping and my PET scans were showing significant
improvements" "I never would have expected to hear No active cancer
this soon"
Source: https://t.co/R26UcS5bkU
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Source: Facebook |



Case 4: Dichloroacetate, Omeprazole (plus tamoxifen), and
Ivermectin for Invasive Breast Cancer
A 69-year-old female was diagnosed with invasive breast cancer in October 2015. She underwent left breast partial mastectomy, but bone metastases and pleural dissemination appeared (Figure 1). She responded to chemo-endocrine therapy, but it soon became less effective, and intolerable side effects appeared. We gave up conventional therapy and started treatment with dichloroacetate, omeprazole, and tamoxifen from October 2021: weekly use of three tablets of 333 mg dichloroacetate per day (on Day 1), three tablets of 40 mg omeprazole per day (on Day 1), along with a tablet of 20 mg tamoxifen every day. This relieved her symptoms (bone pain, shortness of breath, and general fatigue) instantly but not completely. Hence, we added a tablet of 12 mg ivermectin per day (on Day 1), which stabilized pleural effusion and induced tumor marker reduction (CEA or carcinoembryonic antigen), which went down from 12.9 to 7.3, and cancer antigen 15-3 (CA15-3), which went down from 302.3 to 229.4 in three months).
Case 3: Stage 4 ER+PR+HER2- Metastatic Breast Cancer to
bones (December, 2022)
Condition: Stage 4 ER+PR+HER2- Metastatic Breast Cancer to bones
A friend told me about the Joe Tippens Protocol and ivermectin the day after I got my diagnosis for a third bout with breast cancer. I started both immediately. I saw my oncologist a week later. She added Faslodex, Kisqali, and Femara. She supported me added the JTP and the ivermectin. In 8 weeks I was in remission as measured by my CA2729. At week 11, a PET scan showed NED.
Which of the protocol components did you use? Fenbendazole , Curcumin, CBD/ cannabis Oil, Berberine, Other
Other supplements used: 12 mg ivermectin daily
Which conventional treatments did you do? Hormone therapy
Case 2: Stage 4 metastatic breast cancer Mets to lymph nodes, liver and bone in my upper shoulder (March, 2022)
In 2018, I experienced heavy fatigue most of the time. It almost felt as if I got weaker and weaker as the days went by. I felt this lump on the side of my breast and got it checked out right away. I received the news that I have stage 4 metastatic breast cancer Mets to lymph nodes, liver and bone in my upper shoulder.
Case 1: Stage 4 breast cancer with Mets to lymph nodes, bones, and bone marrow (June, 2021)
Three years ago I received a lumpectomy, which is when the cancer gets removed from a part of the breast tissue. The surgery was successful and I was declared free of any cancer back then, till about two years later I was diagnosed with stage 4 breast cancer with Mets to lymph nodes, bones, and bone marrow. It basically spread all over my body. This was terrifying at the time and I felt there was no way to win this battle.
With no options left, I decided to go onto the Joe Tippens protocol, and followed it for a whole good year before I received my PET scan results stating that I am cancer free! And to make this even more insane to think of – I wasn’t receiving any form of chemo or radiation ever during the recovery process, the only medication I consumed alongside following this protocol was hormone blockers.
I however got very sick in the beginning stages of using this protocol and started using Serrapeptase (an enzyme) along with it, which seems to have taken all side effects away. I gained my strength back and my blood tests were normalized on every account. After being only 6 months on the protocol more than half of my cancer disappeared. Here is a brief idea of what my protocol looked like:
- Serrapeptase (as I wake up)
- Fenben, Vit D and Vit K, Quercetin with Zinc (at noon)
- Turkey tail mushrooms & Letrozole (also at noon)
- RSO (before bedtime, but a very little amount)
Video Testimonial of Breast Cancer (Triple Negative Breast Cancer) Recovery with Fenbendazole Protocol
Looking for more case reports? Explore additional cases for other cancer types in our Fenbendazole, Ivermectin and Mebendazole Cancer Case Series.
Notes:
No single drug is a miracle cure for all cancers. Taking a particular drug as a stand alone strategy cannot replace an
unhealthy lifestyle i.e. heavy smoker, alcoholic, a very stressful and
non-active lifestyle, overweight and obesity. All these cancer promoting
factors need to change.
The best way to fight cancer is to utilise a menu of strategies by
maintaining good health, like from eating a nutritious whole-food diet
with lots of fruits and vegetables, avoid ultra processed foods and a
healthy lifestyle. Each strategy might produce an incremental improvement in results for
some cancers when added to existing treatment regimens.
Everyone’s situation is different, however, it is important to arm yourself with medical knowledge that cancer doctors (Oncologists) may simply not give you.
Whether you’re living with cancer or a survivor, talk to your doctor to determine the best treatment for you.
Disclaimers:
- Please do not consider this guide as personal medical advice, but as a recommendation for use by professional providers. Consult with your doctor and discuss with her/him.
- Our aim here isn't to replace your doctors' advice. It is intended as a sharing of knowledge and information. Do take note that most treatments are not 100% protective or curative against cancer. It's a continuous struggle between the immune system and the cancer cells. Cancer treatments are meant to assist the immune system in this battle.
- Cancer treatment should be part of a multi-modal approach in order to provide the best possible outcome. Diet and lifestyle changes are meant to run alongside conventional treatment. They are complementary, not alternative. That said, there is no miracle diet or treatment that can cure all cancers.
Clinical Trials
Clinical Trials of Metastatic Triple Negative Breast Cancer
There are more than 800 clinical trials of ClinicalTrials.gov on metastatic triple negative breast cancer.
Ivermectin and Balstilimab for the Treatment of Metastatic Triple Negative Breast Cancer
A phase I/II trial (NCT05318469) is currently evaluating "Ivermectin and Balstilimab
for the Treatment of Metastatic Triple Negative Breast
Cancer (TNBC)".
According to the administrative update, the current responsible party has changed from City of Hope
Medical Centre to Cedars-Sinai Medical Center. However, the
principal investigator remains the same, Yuan Yuan, MD, PhD.
- Contact: Clinical Trial Navigator
- Phone Number: 310-423-2133 (source).
- Email Address: cancer.trial.info@cshs.org
Find Integrative Oncologists in USA, Mexico, Europe or Asia
While the potential anti-cancer properties of fenbendazole
are intriguing, it’s crucial to approach with caution.
Consulting with an integrative healthcare expert is key to crafting a Fenbendazole protocol tailored to your unique health requirements.
Consulting with an integrative healthcare expert is key to crafting a Fenbendazole protocol tailored to your unique health requirements.
To find integrative oncologists, check out "find integrative oncologists".
References:
- Looking for more case reports? Explore additional cases for other cancer types in our Fenbendazole, Ivermectin and Mebendazole Cancer Case Series.
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