Zachary L. Mannes

June 28, 2025

Cannabis legalization and cannabis use disorder in United States Veterans Health Administration patients with and without psychiatric disorders, 2005–2022: a repeated cross-sectional study

Abstract Background: We investigated whether the associations of state medical and recreational cannabis legalization (MCL, RCL enactment) with increasing prevalence…

June 13, 2025

Cannabis Legalization and Opioid Use Disorder in Veterans Health Administration Patients

Abstract Question: Were medical cannabis laws (MCLs) or recreational cannabis laws (RCLs) associated with opioid use disorder (OUD) in Veterans…

July 12, 2023

Chronic Pain, Cannabis Legalization and Cannabis Use Disorder in Veterans Health Administration Patients, 2005 to 2019

Abstract Background: The risk for cannabis use disorder (CUD) is elevated among U.S. adults with chronic pain, and CUD rates…

March 3, 2022

Substance use disorders and COVID-19: An analysis of nation-wide Veterans Health Administration electronic health records

Abstract Background: Substance use disorders (SUD) elevate the risk for COVID-19 hospitalization, but studies are inconsistent on the relationship of…