can cannabis oil be used to prevent cancer from recurring
1 Cannabis has been used for medicinal purposes for thousands of years. 2  By federal law, the possession of Cannabis, also known as marijuana, is illegal in the United States; however, a growing number of states and the District of Columbia have enacted laws to legalize its medical use.his PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the use of Cannabis and cannabinoids in the treatment of people with cancer. It is intended as a resource to inform and assist clinicians who care for cancer patients.