Half of adults with ADHD have had a substance use disorder

Half of adults aged 20-39 with attention deficit hyperactivity disorder (ADHD) have had a substance use disorder (SUD) in their lifetime according to new research published online ahead of print this month in Alcohol and Alcoholism. This is markedly higher than the 23.6% of young adults without ADHD who have had a substance use disorder in their lifetime.  

source https://medicalxpress.com/news/2021-08-adults-adhd-substance-disorder.html