Attention-deficit/hyperactivity disorder medication and seizures

Area of Science:

• Neurology
• Psychiatry
• Pharmacology

Background:

• Individuals with attention-deficit/hyperactivity disorder (ADHD) exhibit an elevated risk for seizures.
• There is ongoing uncertainty regarding the potential impact of ADHD medications on seizure risk, particularly in patients with and without a history of seizures.

Purpose of the Study:

• To investigate the association between ADHD medication and seizure occurrence in patients diagnosed with ADHD.
• To determine if ADHD medication increases or decreases seizure likelihood in individuals with and without pre-existing seizure conditions.

Main Methods:

• A large cohort of 801,838 patients with ADHD was analyzed using prescription drug claims data.
• Within-individual analyses compared seizure occurrence during periods of ADHD medication use versus non-use, adjusting for antiepileptic drugs.
• Long-term analyses assessed seizure risk in relation to cumulative medication exposure over two years.

Main Results:

• Patients with ADHD demonstrated significantly higher odds of seizures compared to controls (ORs ranging from 2.31 to 2.33).
• ADHD medication use was associated with lower odds of seizures in both patients with (OR = 0.71) and without (OR = 0.71) prior seizures.
• Long-term medication exposure did not show a significant association with increased seizure risk.

Conclusions:

• The study confirms an increased seizure risk in individuals with ADHD.
• ADHD medications appear to be associated with a reduced risk of seizures within individuals, challenging the hypothesis of increased risk.
• Findings suggest that ADHD medication may have a protective effect against seizures in this population.