ADHD is a highly comorbid disorder in patients with substance use disorders (SUD). This comorbid patient population is, however, often undertreated. Diagnosing ADHD in patients with SUD is not easy due to the large overlap of the ADHD characteristics with symptoms of intoxication and withdrawal.

These patients often disappear prematurely from the treatment services, on the one hand because their untreated ADHD symptoms make it more difficult to follow the therapy, on the other hand because th...