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Medical Cannabis: Home

What Is Medical Cannabis?

Medical cannabis refers to using the whole, unprocessed cannabis plant or its basic extracts to treat symptoms of illness and other conditions. It is also known by several other names including weed, marijuana, grass, hash, or pot. Cannabis can be used in many different ways including smoking, vaping, consuming edibles, and applying topical creams or oils.

The U.S. Food and Drug Administration (FDA) has not recognized or approved the cannabis plant as medicine. However, there have been scientific studies of cannabinoids, the chemicals in cannabis. The two main cannabinoids that are of medical interest are THC and CBD. The FDA has approved two drugs that contain THC. These drugs treat nausea caused by chemotherapy and increase appetite in patients who have severe weight loss from AIDS. There is also a liquid drug that contains CBD. It treats two forms of severe childhood epilepsy. Scientists are doing more research with cannabis and its ingredients to treat many diseases and conditions.


RIdley-Tree Cancer Center Community Lectures - Medical Cannabis and Cancer: What You Need to Know 

Kelay Trentham, MS, RDN, CSO and Liz Rogan, cannabis consultant and educator discuss potential benefits, adverse effects, and modes of use of medical cannabis for cancer.


Mayo Clinic Radio: CBD products - what's safe to use?

Dr. Brent Bauer, director of research for the Mayo Clinic Integrative Medicine Program, and Dr. Karen Mauck, a Mayo Clinic internal medicine specialist, discuss how to know which CBD products are safe to use.

Cannabinoid Prescription Medications

The Food and Drug Administration has approved two cannabinoid based medications for the prevention or treatment of chemotherapy related nausea and vomiting.

Clinical Trials

Clinical trials are research studies that test how well new medical approaches work in people. For more information about clinical trials, see the Cancer Basics: Clinical Trials Information Guide

Books at the Resource Library

These are just a few highlights from the Resource Library collection. Please click here to search our online catalog. For more information about the Resource Library and how to borrow materials, visit our website

Legal Information

The laws governing the use and possession of cannabis can be complicated. Cannabis remains classified as a Schedule I agent under the federal Controlled Substances Act, and its purchase, possession, distribution, or use may be unlawful under federal law. Laws may vary by state and even by county. Under California law, it is legal for adults 21 or older to possess, consume and cultivate cannabis. However, there are regulations that determine how much an individual can possess and/or cultivate. Sale of cannabis from licensed retail outlets became legal January 1, 2018. You can also use cannabis if you are 18 or older and have a current qualifying physician’s recommendation or a valid county-issued medical cannabis identification card. 

Know the Laws | Let's Talk Cannabis

Let's Talk Cannabis gives you facts and tips about the new adult-use marijuana law in California.

Resources provided by the Cancer Resource Library are for informational purposes only. The information in these materials may or may not apply to your specific condition, and should not be construed as medical advice. We strongly encourage you to consult your healthcare provider to review anything you learn through these resources.

Ridley-Tree Cancer Center provides comprehensive cancer treatment and support programs for patients and families. We are recognized for medical excellence, a strong clinical research program, and a multidisciplinary approach to cancer prevention.

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