Clonidine Improves Hyperarousal in Borderline Personality Disorder With or Without Comorbid Posttraumatic Stress Disorder

Abstract

The Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition borderline personality disorder (BPD) seems to constitute a very heterogeneous category. Therefore, pharmacological therapy is symptom-oriented or targets comorbid conditions. A high comorbidity exists between BPD and posttraumatic stress disorder (PTSD). In a double-blind, randomized, placebo-controlled crossover study, we sought to determine whether the antinoradrenergic agent clonidine was effective in reducing hyperarousal and measures of BPD-specific and general psychopathology in a sample of 18 patients with BPD, with or without comorbid PTSD, and with a prominent hyperarousal syndrome. Hyperarousal as measured by the Clinician Administered PTSD scale improved significantly compared with placebo (P = 0.003) irrespective of PTSD comorbidity. Improvements in general and BPD-typical psychopathology were mainly seen in the PTSD-positive subgroup, whereas the subjective sleep latency (P = 0.005) and the restorative qualities of the sleep (P = 0.014) improved in the whole sample. Improvements, despite the small sample size of this pilot study, lead us to conclude that clonidine might be a useful adjunct to pharmacotherapy in patients with BPD who have marked hyperarousal and/or sleep problems and, in particular, in patients with BPD who have a PTSD comorbidity.

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