Arnt Schellekens, MD, PhD

Nijmegen Institute for Science Practitioners in Addiction (NISPA), Nijmegen, The Netherlands; Department of Psychiatry, Radboud University Medical Center, Nijmegen, The Netherlands

JCP
Placebo Effects in Alcohol, Cocaine, and Methamphetamine Use Disorder
Meta-Analysis

June 10, 2026

Placebo treatment led to reductions in craving scores across all three disorders, although statistical significance was achieved only in alcohol use disorder.
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JCP
Treatments and Treatment Predictors in Patients With SUDs and ADHD
Original Research

December 23, 2024

Treatment site explained more of the variation in ADHD treatment provision than patient factors. Higher ADHD symptom severity and sobriety at intake were associated with receiving ADHD treatment.
, , , et al

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