The dried leaves and flowering tops of the Cannabis sativa or Cannabis indica plant. Marijuana contains active chemicals called cannabinoids that cause drug-like effects all through the body, including the central nervous system and the immune system. Marijuana may help treat the symptoms of cancer or the side effects of cancer treatment, such as nausea and vomiting, pain, and cachexia (loss of body weight and muscle mass). Also called Cannabis.
Source: NCI Dictionary of Cancer Terms2003-02-21 Date last modified: 2012-02-23Cannabis and Cannabinoids