ADD & ADHD

ADHD Symptoms Linked to Cannabis Use Through CNR1-Rich Inhibitory-Control Regions

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ADHD Symptoms Linked to Cannabis Use Through CNR1-Rich Inhibitory-Control Regions

TL;DR: A 2026 medRxiv preprint linked greater attention-deficit/hyperactivity disorder (ADHD) symptom scores in college students to reduced stop-signal functional MRI (fMRI) activation in cannabinoid receptor 1 (CB1R)-rich brain regions, and that reduced activation predicted heavier cannabis-use trajectories over 4 years. Key Findings ADHD-cannabis trajectory: Researchers analyzed cannabis-use trajectories in 466 first-year college students aged 18-19, …

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Three Childhood ADHD Dimensions Each Predicted Distinct Adult Mood-Disorder Profiles in 755 Patients

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Three Childhood ADHD Dimensions Each Predicted Distinct Adult Mood-Disorder Profiles in 755 Patients

TL;DR: A 2026 study in European Archives of Psychiatry and Clinical Neuroscience of 755 Korean adults with mood disorders found that three distinct childhood ADHD traits each tracked with different adult clinical features, suggesting ADHD’s influence on mood-disorder presentation is dimension-specific rather than uniform. Key Findings Mood-disorder profiles split by ADHD trait: Researchers analyzed 755 …

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Bumetanide Study Captured Sensory-Reactivity Changes in Neurodevelopmental Disorders

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Bumetanide Study Captured Sensory-Reactivity Changes in Neurodevelopmental Disorders

TL;DR: A 2026 preprint in medRxiv found that a parent-cocreated sensory-reactivity outcome set captured anxiety, mood, sleep, fatigue, cognition, and peer-relationship changes during bumetanide treatment in children and adolescents with neurodevelopmental disorders, but the unmasked design means the results should not be treated as definitive drug efficacy evidence. Key Findings Treatment cohort: 113 children and …

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Adult ADHD Linked to Lower SIRT-1, Nrf-2, and HO-1 Biomarkers

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Adult ADHD Linked to Lower SIRT-1, Nrf-2, and HO-1 Biomarkers

TL;DR: A 2026 cross-sectional study in Metabolic Brain Disease linked adult attention-deficit/hyperactivity disorder (ADHD) with lower serum SIRT-1, Nrf-2, and HO-1, three redox-regulation markers tied to antioxidant defense. Key Findings 120 adults studied: The analysis compared 60 adults with ADHD against 60 age- and sex-matched healthy controls. SIRT-1 was lower: Mean serum SIRT-1 was 9.36 …

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Sleep History Modulated Wake EEG Oscillations Across Development With Distinct ADHD Patterns

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Sleep History Modulated Wake EEG Oscillations Across Development With Distinct ADHD Patterns

TL;DR: A 2026 eNeuro study of 163 people ages 3-25 found that sleep history and age shaped waking electroencephalography (EEG) oscillations, while children with ADHD showed distinct sleep-wake EEG patterns. Key Findings Sleep and development interact to shape wake EEG oscillations: The amount of recent sleep or wakefulness produces age-dependent effects on EEG oscillation amplitude …

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Methylphenidate Reduced Dishonesty in Healthy Adults Compared to Placebo in Double-Blind Trial

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Methylphenidate Reduced Dishonesty in Healthy Adults Compared to Placebo in Double-Blind Trial

TL;DR: A 2026 double-blind trial in Psychopharmacology found that methylphenidate reduced cheating in healthy adults compared with placebo, contrary to survey respondents’ expectations about smart drugs. Key Findings Methylphenidate reduced dishonesty vs placebo: A double-blind placebo-controlled experiment in healthy adults showed methylphenidate (Ritalin) reduced cheating behavior compared to placebo — the opposite direction from what …

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Childhood ADHD and Autism Predicted Adult Outcomes, But Rare CNVs Did Not Clarify Risk

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Childhood ADHD and Autism Predicted Adult Outcomes, But Rare CNVs Did Not Clarify Risk

TL;DR: A 2026 cohort study in BJPsych Open found that childhood attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) difficulties predicted poorer young-adult outcomes, but rare copy number variants (CNVs), which are deleted or duplicated DNA segments, did not clearly sharpen that prognosis. Key Findings 8,414 young people had CNV data: Researchers analyzed genetic and …

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AI Identified ADHD Risk From Electronic Health Records Before Formal Diagnosis

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AI Identified ADHD Risk From Electronic Health Records Before Formal Diagnosis

TL;DR: A 2026 study in Nature Mental Health describes an AI system that scans routine electronic health records (EHRs) and combines early-life visits, prescriptions, and comorbidities into a risk flag for ADHD evaluation before formal diagnosis. Key Findings AI flagged ADHD risk from routine EHR data alone: The model identified patterns predictive of future ADHD …

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Half of 292 Adult ADHD Randomized Trials Skipped a General Psychopathology Assessment, Scoping Review Found

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Half of 292 Adult ADHD Randomized Trials Skipped a General Psychopathology Assessment, Scoping Review Found

TL;DR: A 2025 scoping review in European Psychiatry screened 292 randomized trials of adults diagnosed with attention-deficit/hyperactivity disorder (ADHD) and reported that 49.7% did not assess general psychopathology and only 35% had the ADHD diagnosis allocated by a psychiatrist or psychologist. Key Findings Half of the trials skipped a general psychopathology check: 49.7% of the …

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Children and Adolescents With ADHD Had Roughly 6x the Depression Rate of Peers in 24-Study Meta-Analysis

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Children and Adolescents With ADHD Had Roughly 6x the Depression Rate of Peers in 24-Study Meta-Analysis

TL;DR: A 2025 meta-analysis in the Journal of Attention Disorders pooled 24 studies (N=6,815) and estimated that 11.31% of children and adolescents with ADHD had co-occurring depression — about six times the rate seen in neurotypical peers in head-to-head case-control studies (~12% vs ~2%). Key Findings Pooled depression rate of 11.31% across 24 studies: The …

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