Sensitization components of post-traumatic stress disorder: implications for therapeutics

Anticonvulsant Medication Use in Veterans With Posttraumatic Stress Disorder

OBJECTIVE

Anticonvulsants have been studied for many indications, including posttraumatic stress disorder (PTSD). The limited efficacy research on anticonvulsants for PTSD is mixed. However, anticonvulsants are prescribed widely to veterans with PTSD. Our objective was to measure trends and factors associated with anticonvulsant prescriptions among veterans with PTSD.

METHODS

We obtained administrative and pharmacy data for veterans who initiated PTSD treatment in the US Department of Veterans Affairs (VA) between 2004 and 2013 (N = 731,520). We identified those who received anticonvulsants during the year following their initial clinical PTSD diagnosis and examined common indications for anticonvulsant use, patient characteristics, and service use characteristics. Using logistic regression, we determined the predictors of anticonvulsant initiation among those without an indication.

RESULTS

Although 24.9% of patients in the cohort received an anticonvulsant during their initial year of PTSD treatment, 94.6% had an indication unrelated to PTSD and 51.2% initiated anticonvulsant use before their PTSD diagnosis. While there was growth in anticonvulsant initiation over the 10-year period, this was explained both by growth in indications unrelated to PTSD and by increased use of anticonvulsants for these indications. The rate of anticonvulsant initiation without an indication was stable at approximately 5% throughout the period, with patient and service use characteristics driving the selection of individual agents.

CONCLUSIONS

A large and increasing proportion of veterans with PTSD receives anticonvulsant prescriptions. However, this may be appropriate use driven by increased prevalence of comorbid conditions that may be an indication for anticonvulsant use, including pain and headache disorders.

An open-label pilot study of divalproex sodium for posttraumatic stress disorder related to childhood abuse

BACKGROUND

Few effective pharmacotherapeutic strategies have been established for the treatment of symptoms associated with posttraumatic stress disorder (PTSD). Preliminary evidence supports the efficacy of serotonergic agents and anticonvulsants, such as divalproex sodium, for the treatment of PTSD symptoms, particularly in military populations.

OBJECTIVE

The aim of this study was to obtain pilot data on the use of divalproex sodium for the treatment of PTSD among adult civilian outpatients with a history of childhood physical and/or sexual abuse.

METHODS

Outpatients with a primary psychiatric diagnosis of PTSD received open-label, flexibly dosed divalproex sodium as adjuvant therapy or monotherapy for 8 weeks. Overall and subcluster PTSD features, as well as affective symptoms and clinical global improvement, were monitored using standardized assessment scales.

RESULTS

A total of 7 patients (5 women, 2 men; mean age, 44.1 years [range, 29-57 years]) were enrolled. At a mean (SD) peak dosage of 1500 (661) mg/d, significant improvement occurred in overall PTSD symptom severity (P<0.02) and in the diagnostic subclusters of hyperarousal and avoidance (P<0.02 for both). Depressive symptoms also were significantly improved from baseline (P<0.02). Divalproex sodium was well tolerated, except in 1 patient who prematurely discontinued treatment due to cognitive adverse events.

CONCLUSIONS

These provisional findings support the possible utility of divalproex sodium therapy for adult outpatients with PTSD related to physical and/or sexual abuse during childhood. Controlled trials with larger sample sizes powered to show safety and efficacy are needed to substantiate these initial findings.