Temporal trends in new exposure to antiepileptic drug monotherapy and suicide-related behavior

Mary Jo V. Pugh, Dale Hesdorffer, Chen Pin Wang, Megan E. Amuan, Jeffrey V. Tabares, Erin P. Finley, Joyce A. Cramer, Andres M. Kanner, Craig J. Bryan

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19 Scopus citations

Abstract

Objective: Because some recent studies suggest increased risk for suicide-related behavior (SRB; ideation, attempts) among those receiving antiepileptic drugs (AEDs), we examined the temporal relationship between new AED exposure and SRB in a cohort of older veterans. Methods: We used national Veterans Health Administration databases to identify veterans aged 65 years who received a new AED prescription in 2004-2006. All instances of SRB were identified using ICD-9-CM codes 1 year before and after the AED exposure (index) date. We also identified comorbid conditions and medication associated with SRB in prior research. We used generalized estimating equations with a logit link to examine the association between new AED exposure and SRB during 30-day intervals during the year before and after the index date, controlling for potential confounders. Results: In this cohort of 90,263 older veterans, the likelihood of SRB the month prior to AED exposure was significantly higher than in other time periods even after adjusting for potential confounders. Although there were 87 SRB events (74 individuals) the year before and 106 SRB events (92 individuals) after, approximately 22%(n 5 16) of those also had SRB before the index date. Moreover, the rate of SRB after AED start was gradually reduced over time. Conclusions: The temporal pattern of AED exposure and SRB suggests that, in clinical practice, the peak in SRB is prior to exposure. While speculative, the rate of gradual reduction in SRB thereafter suggests that symptoms may prompt AED prescription.

Original languageEnglish (US)
Pages (from-to)1900-1906
Number of pages7
JournalNeurology
Volume81
Issue number22
DOIs
StatePublished - Nov 26 2013

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Keywords

  • 9th revision
  • AED 5 antiepileptic drug
  • ClinicalModification
  • FDA 5 US Food and Drug Administration
  • FY 5 fiscal year
  • GEE 5 general estimating equations
  • ICD-9-CM5 International Classification of Diseases
  • OR 5 odds ratio
  • PTSD 5 posttraumatic stress disorder
  • SRB 5 suicide-related behavior
  • VA 5 Veterans Health Administration.

ASJC Scopus subject areas

  • Clinical Neurology

Cite this

Pugh, M. J. V., Hesdorffer, D., Wang, C. P., Amuan, M. E., Tabares, J. V., Finley, E. P., Cramer, J. A., Kanner, A. M., & Bryan, C. J. (2013). Temporal trends in new exposure to antiepileptic drug monotherapy and suicide-related behavior. Neurology, 81(22), 1900-1906. https://doi.org/10.1212/01.wnl.0000436614.51081.2e