Yes, there are risks to consider when using cannabis as an aging guide. Cannabis use can impair memory and motor coordination, increase heart rate and blood pressure, reduce reaction time, and impair decision-making skills. Frequent or long-term use of cannabis has been linked to a variety of mental health issues such as depression, anxiety, psychosis and paranoia. It is also important to note that smoking cannabis can have many of the same adverse effects on the lungs as smoking cigarettes does. Regular cannabis users may experience withdrawal symptoms if they stop using it suddenly. These symptoms include irritability, difficulty sleeping and decreased appetite.