Pot Slows Cancer in Test Tube Marijuana Ingredients Slow Invasion by Cervical and Lung Cancer Cells By Daniel J. DeNoonWebMD Medical News Reviewed by Louise Chang, MD Dec. 26, 2007 -- THC and another marijuana-derived compound slow the spread of cervical and lung cancers, test-tube studies suggest.The new findings add to the fast-growing number of animal and cell-culture studies showing different anticancer effects for cannabinoids, chemical compounds derived from marijuana.Cannabinoids, and sometimes marijuana itself, are currently used to lessen the nausea and pain experienced by many cancer patients. The new findings -- yet to be proven in human studies --...