Cannabis is often thought of as a young person’s drug. But the reality is that more and more people of all ages are asking their doctors about medical marijuana to treat a whole host of issues, from chronic pain, insomnia, and even some of the symptoms associated with dementia. What's behind this trend? To learn about the benefits and risks of this type of treatment, Dr. Gupta turns to Dr. Aaron Greenstein, a geriatric psychiatrist who treats patients over the age of 65 with mental health issues. Dr. Greenstein will share his personal story of using cannabis to help his grandmother in her final days, and what patients of all ages should consider when seeking out this type of treatment.To learn more about how CNN protects listener privacy, visit cnn.com/privacy