Pharmacological interventions for people with borderline personality disorder
Abstract
Background
Borderline Personality Disorder (BPD) is prevalent (2% in the general population, 20% among psychiatry in‐patients) and has a major impact on health facilities as those affected often present in crisis but then make poor use of further attempts to help them.
Objectives
To evaluate the effects of pharmacological interventions for people with borderline personality disorder.
Search methods
We conducted a systematic search of 26 specialist and general bibliographic databases (October 2002) and searched relevant reference lists for further trials.
Selection criteria
We included all randomised clinical trials comparing any psychoactive drugs with any other treatment for people with borderline personality disorder.
Data collection and analysis
We independently selected, quality assessed and data extracted studies. For binary outcomes we calculated a standard estimation of the risk ratio (RR), its 95% confidence interval (CI), and where possible the number need to help/harm (NNT/H). For continuous outcomes, endpoint data were preferred to change data. Non‐skewed data from valid scales were synthesised using a weighted mean difference (WMD).
Main results
We found ten small (total n=554), short, randomised studies involving eight comparisons from which we could extract usable data. Studies comparing antidepressants with placebo were small (total n=79, 2 RCTs) but for ratings of anger fluoxetine may offer some improvement for those on antidepressant therapy over placebo (n=22, 1 RCT, RR anger not improved 0.30 CI 0.10 to 0.85, NNT 2 CI 2 to 9). The one small study investigating the important outcome of attempted suicide found no difference between mianserin and placebo (n=38, 1 RCT, RR 0.82 CI 0.44 to 1.54). Haloperidol may be better than antidepressants for symptoms of hostility and psychotism. There were few differences between MAOIs and placebo except that people given MAOIs were less hostile (n=62, 1 RCT, MD ‐9.19 CI ‐16.12 to ‐2.26). Although some ratings were statistically significant the comparison of MAOIs with antipsychotics did not show convincing differences. Antipsychotics may effect some mental state symptoms more effectively than placebo but results are difficult to interpret clinically and there is little evidence of advantage of one antipsychotic over another. Finally mood stabilisers such as divalporex may help mental state (n=16, 1 RCT, RR no improvement in mental state 0.58 CI 0.36 to 0.94, NNT 3 CI 2 to 17) but data are far from conclusive.
Authors' conclusions
Pharmacological treatment of people with BPD is not based on good evidence from trials and it is arguable that future use of medication should be from within randomised trials. Current trials suggest that the positive effect of antidepressants, in particular, could be considerable. Well designed, conducted and reported clinically meaningful trials are possible and needed with, perhaps, the question of antidepressant versus placebo being addressed first.
Plain language summary
Pharmacological interventions for people with borderline personality disorder
People with Borderline Personality Disorder (BPD) tend to have an unstable sense of self with difficulty in interpersonal relationships, impulsiveness, and unstable mood. It is relatively common with rates of about 2% in the general population but it is present in 20% among psychiatry in‐patients. Self‐harming behaviour is common in this group of people and BPD has a major impact on health facilities as those affected often present in crisis, but then make poor use of further attempts to help them. Evidence of the effects of commonly prescribed drugs is poor but not without some areas of hope. Antidepressants are often employed in routine care and trial evidence does suggest there may be some positive effects. This is an important, urgent area for research.
