Cannabis and Tobacco Use on the Rise, Especially Among Older Adults Image Cannabis News August 22, 2024 Rising Trend of Cannabis and Tobacco Co-Use Among Older Americans: A Growing Public Health Concern. The number of Americans using both cannabis and tobacco is increasing, with a particular surge among older adults, a new study finds. Researchers at Duke University School of Medicine who analyzed two Medical Cannabis News Recreational Marijuana News Marijuana Business News Med School Duke