Attention-deficit hyperactivity disorder (ADHD) is frequently comorbid with schizophrenia spectrum disorders (SSDs) and is associated with poorer outcomes. Yet, its pharmacological treatment in patients with SSDs has been hampered by safety concerns. We therefore examined whether psychiatric, cardiovascular and other medical outcomes are associated with the use of ADHD medications in people with SSDs (N = 131,476). The main outcome was all-cause hospitalization/mortality. Secondary outcomes were…
