Cannabis and Cancer: Science, Symptoms, and Survival: See the Youtube Documentary

12 Jun Cannabis and Cancer: Science, Symptoms, and Survival: See the Youtube Documentary

Editor’s Note: Cannabis laws and regulations vary by country, state, and territory. This interview is for educational purposes only. Cannabis products discussed here are not endorsed by MedicalResearch.com. Patients should consult their oncologist or healthcare provider before using any cannabis or cannabinoid product, particularly during cancer treatment. Cannabis products should not be used while driving, by children, if pregnant, nursing or planning to become pregnant or mixed with other substances that can affect cognition. Cannabis products may also be contraindicated in other medical conditions or situations.

MedicalResearch.com Interview with:
Raphael E. Cuomo, PhD
Associate Professor
University of California, San Diego
Developer and Host, Cannabis and Cancer (Apple TV Documentary)
 

MedicalResearch.com: What is the background for this documentary? What are the primary components of cannabis plants?

Response: I created Cannabis and Cancer because cannabis is now widely discussed by patients, clinicians, policymakers, and the general public, but there is still a lot of confusion about what the science actually says. Much of the public conversation treats cannabis as either broadly harmful or broadly beneficial. The reality is more complex.

The documentary is meant to separate questions that are often conflated: whether cannabis exposure may influence the risk of developing cancer, whether cannabis use may affect cancer treatment or symptoms, and whether it may influence survival after a cancer diagnosis. These are very different scientific questions, and each one requires a different type of evidence.

Cannabis plants contain many biologically active compounds. The most widely discussed are cannabinoids, especially THC and CBD. THC is the main intoxicating compound and is responsible for many of the psychoactive effects. CBD is not intoxicating in the same way, but it still has biological effects. Cannabis also contains other cannabinoids, terpenes, flavonoids, and plant compounds that may influence how different products affect the body.

MedicalResearch.com: What are the main effects of cannabis-derived components on health-related issues?

Response: Cannabis-derived components can affect many systems in the body, including the brain, immune system, gastrointestinal system, and respiratory system. Depending on the compound, dose, route of use, and individual patient, cannabis-related products may influence nausea, appetite, pain perception, sleep, anxiety, mood, cognition, coordination, and inflammation.

One important point in the documentary is that cannabis should not be treated as one uniform exposure. Smoked cannabis is different from an edible, an oil, a prescription cannabinoid, or a CBD product. Smoking introduces combustion products, which raises different biological concerns than non-smoked routes. Likewise, a high-THC product has a different risk profile than a CBD-dominant product.

So the central issue is context. The health effects depend on what is being used, how it is being used, how often it is being used, and whether the person is healthy, at risk for disease, undergoing cancer treatment, or living with advanced cancer.

MedicalResearch.com: How can cannabis products influence or support cancer care?

Response: The strongest role for cannabis-related products in cancer care is supportive care. That means helping with symptoms rather than treating the cancer itself. Some cannabinoid medications have been used for chemotherapy-related nausea and vomiting, especially when standard medications are not enough. Cannabis-related products are also commonly discussed in relation to appetite, pain, sleep, and quality of life.

The documentary explains why that matters. If a patient can better control nausea, eat more consistently, sleep better, and tolerate treatment more effectively, those improvements could potentially influence treatment adherence and overall care. However, that is very different from saying cannabis is a cancer treatment.

One of the main messages of the film is that symptom support, treatment tolerance, and cancer survival are connected, but they are not the same thing. The scientific evidence has to be interpreted carefully.

MedicalResearch.com: Are there issues surrounding purity, strength, or availability of cannabis products?

Response: Yes, and this is a major issue. Cannabis products vary widely in strength, formulation, labeling accuracy, and purity. Two products both labeled as cannabis or CBD can be very different in terms of THC content, CBD content, contaminants, route of administration, and biological effect.

This is especially important for patients with cancer because they may be immunocompromised, taking multiple medications, or receiving therapies where drug interactions and immune effects matter. A regulated prescription cannabinoid is very different from an unregulated product purchased online or from a retail market.

Availability also varies widely depending on geography and local laws. In many cases, patients are using products without clear medical guidance. That is why I think clinicians and researchers need to engage this topic directly, rather than ignoring it or leaving patients to navigate it on their own.

MedicalResearch.com: What should readers take away from this documentary?

Response: The main takeaway is that the influence of cannabis on health cannot be reduced to a simple yes or no answer. The better question is: for whom, at what dose, through what route, at what stage of disease, and for what purpose?

A central concept in the film is the risk-survival paradox, sometimes referred to as Cuomo’s Paradox as I first introduced it in the medical literature. The idea is that a factor may influence the risk of developing a disease in one way, while influencing outcomes after diagnosis in another way. In cancer, that distinction is especially important.

This film is not pro-cannabis or anti-cannabis. It is a science-grounded investigation into a topic where the public has not yet received enough clarity. I want viewers to come away with a more precise way of thinking about cannabis, cancer risk, treatment support, and survival.

MedicalResearch.com: What recommendations do you have for future research as a result of your work?

Response: Future research should be more specific. It is not enough to ask whether someone uses cannabis. It would be much better to know what product they used, how often they used it, how much THC and CBD it contained, whether it was smoked or ingested, when they used it relative to diagnosis and treatment, and whether it was used medically, recreationally, or in the context of cannabis use disorder.

We also need more prospective studies that follow patients over time and measure clinically meaningful outcomes, including symptom burden, treatment adherence, treatment tolerance, immune function, recurrence, survival, and quality of life.

My own work has focused on the importance of distinguishing cancer risk from post-diagnosis survival. I encourage future research to apply that same level of precision to cannabis exposure. Different products, different routes, and different patient populations may have very different implications.

MedicalResearch.com: Is there anything else you would like to add?

Response: I would add that patients are already using cannabis products, often without discussing it with their oncology team. That creates a gap between real-world behavior and medical guidance. I think the scientific and medical communities have a responsibility to address this topic clearly, carefully, and without judgment.

The goal of the documentary is not to tell people what to think. It is to give viewers a better framework for understanding the evidence.

You can watch the trailer here: Cannabis and Cancer — Official Trailer

MedicalResearch.com: Any disclosures?

Response: I developed and host Cannabis and Cancer. I am a professor and scientist at the University of California, San Diego. My comments are for public education and should not be interpreted as individualized medical advice. Patients should speak with their medical or oncology team before starting, stopping, or changing any cannabis or cannabinoid product.

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Last Updated on June 12, 2026 by Marie Benz MD FAAD