The effects of psychedelics on attention deficit and hyperactivity disorder - a systematic review.
Acta neuropsychiatrica June 10, 2026 Helerin Raikkerus, Andrea Bujour, Mark Kennedy et al.
A systematic review of research on psychedelics for ADHD identified only six studies meeting inclusion criteria. One randomized controlled trial found no statistically important difference compared to placebo. Three cross-sectional studies reported positive effects of psychedelics, and one found statistically important improvement measured by the Child Bipolar Questionnaire. A case study showed improvement in depressive symptoms and functioning with ketamine. The evidence is insufficient to recommend psychedelics for ADHD, and it remains unknown whether patients whose depression responds to ketamine also have ADHD. No research examined how psychedelics affect patient subgroups with different causes of symptoms.