Effects of Inhaled Tobacco and Cannabis Co-Use on Respiratory Health and Tobacco Cessation: An Official American Thoracic Society Research Statement

Abstract Background: Tobacco and cannabis are among the most widely used substances globally, and rates of co-use are on the rise. Understanding the impact of inhaled tobacco-cannabis co-use on health outcomes and tobacco cessation is critical for guiding patients and clinicians. Objectives: To summarize the existing evidence, identify knowledge gaps, and prioritize research questions related to effects of inhaled tobacco-cannabis co-use on tobacco cessation and lung health. Methods: A multidisciplinary committee was convened to review the evidence, identify knowledge gaps,