A recent study published in JAMA Network Open has sparked renewed debate about celebrity influence on medical decisions and the dangers of unproven cancer treatments. Researchers found that prescriptions for ivermectin nearly doubled in the United States after actor Mel Gibson discussed the drug on a popular podcast in early 2025.
The findings highlight how quickly medical misinformation can spread online, especially when promoted by influential public figures. Health experts are now warning patients about the risks of using unapproved treatments instead of evidence-based cancer therapies.
According to researchers from University of California, Los Angeles and Virginia Tech, ivermectin prescriptions increased by 97% in the six months following Gibson’s appearance on “The Joe Rogan Experience.”
During the podcast interview, Gibson claimed that three friends diagnosed with stage 4 cancer experienced recovery after taking ivermectin and fenbendazole. Fenbendazole is a veterinary deworming medication that is not approved for human cancer treatment.
The study analyzed electronic health record data from more than 68 million patients across 67 healthcare organizations in the United States. Researchers compared prescription trends before and after the podcast episode aired.
The results showed especially sharp increases among cancer patients, men, younger adults, and people living in the Southern United States.
Ivermectin is an antiparasitic medication commonly used to treat certain parasitic infections in humans. During the COVID-19 pandemic, the drug became controversial after social media influencers and public figures promoted it as a treatment for the virus despite limited scientific evidence.
Researchers note that ivermectin and fenbendazole have demonstrated some anti-cancer effects in laboratory studies and animal experiments. However, no large clinical trials have proven these drugs are safe or effective cancer treatments for humans.
Medical professionals fear that patients may delay chemotherapy, immunotherapy, radiation, or surgery while experimenting with unverified alternatives found online.
Dr. Katherine Kahn, a professor of medicine at UCLA, warned that widely shared health information is not always accurate, even when it comes from trusted or recognizable personalities. She emphasized that delaying proven medical care can create serious health risks for cancer patients.
The study demonstrates how celebrity endorsements can dramatically shape public behavior, especially in healthcare decisions.
Podcasts, social media platforms, and video-sharing websites now allow public figures to reach millions of listeners instantly. When celebrities discuss personal experiences or anecdotal medical stories, audiences may interpret those statements as trustworthy medical advice.
Researchers found that prescribing rates increased more than 2.5 times among people with cancer after Gibson’s comments became widely circulated online.
Healthcare experts say misinformation spreads rapidly because emotional stories often feel more convincing than scientific data. A celebrity testimonial can sometimes influence public opinion more strongly than years of clinical research.
This trend has become increasingly visible since the COVID-19 pandemic, when misinformation regarding vaccines, ivermectin, and alternative therapies spread widely across digital platforms.
“The Joe Rogan Experience” remains one of the world’s most influential podcasts, attracting millions of listeners globally. Experts believe podcasts can significantly affect public health conversations because they often feature long-form, informal discussions that audiences perceive as authentic and trustworthy.
Unlike peer-reviewed medical journals, podcasts and social media platforms typically do not fact-check health claims before publication.
Researchers involved in the study stressed that healthcare systems must respond more quickly with accurate and accessible medical information whenever viral claims begin spreading online.
Michelle Rockwell, assistant professor of family and community medicine at Virginia Tech, explained that health systems need strategies to meet patients “in the moment” with trustworthy guidance before misinformation becomes deeply rooted.
Cancer specialists continue to urge patients to discuss any supplements, alternative therapies, or off-label medications with licensed healthcare professionals before trying them.
Evidence-based cancer treatments undergo years of clinical testing to determine safety, dosage, side effects, and effectiveness. While experimental therapies can sometimes lead to breakthroughs, doctors caution against relying solely on anecdotal reports from celebrities or internet influencers.
Patients searching for alternative treatments may be emotionally vulnerable, especially after difficult diagnoses. Experts say this makes accurate communication from healthcare providers more important than ever.
Dr. John Mafi, associate professor of medicine at UCLA, expressed concern that people could abandon proven therapies in favor of treatments lacking scientific validation. According to researchers, this trend could negatively impact survival rates if patients postpone appropriate care.
Laboratory research often identifies substances that appear promising against cancer cells in petri dishes or animal models. However, many drugs that show early promise fail during human clinical trials because they are ineffective or unsafe at therapeutic doses.
Scientists emphasize that early-stage findings do not automatically translate into successful human treatments.
This distinction is crucial because many social media discussions oversimplify scientific studies or remove important context. A medication showing anti-cancer activity in mice does not mean it can safely cure cancer in people.
Medical experts recommend reviewing information from trusted organizations such as the National Institutes of Health, the American Cancer Society, and licensed oncologists when evaluating treatment claims.
The dramatic increase in ivermectin prescriptions after Mel Gibson’s podcast comments illustrates the growing influence of celebrities and digital media on healthcare choices. While curiosity about emerging therapies is understandable, experts stress the importance of relying on scientifically validated medical advice.
Researchers hope the findings encourage stronger public health communication and greater awareness about the risks associated with unproven cancer treatments. In the age of viral content and influencer-driven discussions, distinguishing between anecdotal stories and evidence-based medicine has become more important than ever.
This article is for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting, stopping, or changing any medication or cancer treatment plan. Individual medical situations vary, and online information should never replace professional medical guidance.
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