Obtaining a medical marijuana card may pose a risk for those who use cannabis products to treat pain, anxiety, or depression, according to a Massachusetts General Hospital study. In a significant minority of individuals, researchers found those at greatest risk of developing the addictive symptoms of cannabis use disorder (CUD) were seeking relief from anxiety and depression, suggesting the need for stronger safeguards over the dispensing, use, and professional follow-up of people who legally obtain cannabis through medical marijuana cards (MMC). The findings were published in JAMA Network Open.