The efficacy and safety of risperidone was evaluated in veteran patients with chronic combat-related posttraumatic stress disorder (PTSD) who were referred to a residential treatment program.
Seventy-three subjects volunteered to participate in this double-blind, placebo-controlled study, which comprised of a 5 week residential program followed by a 3-month outpatient follow-up. Risperidone was added to a stable psychotropic medication regimen in 92% of subjects. Primary outcome measures were the Clinician-Administered PTSD scale (CAPS-total) and its three subscales; B (Re-experiencing), C (Avoidance) and D (Arousal). Secondary outcome measures were the Hamilton Anxiety (HAM-A) and Depression (HAM-D) scales, and the Positive and Negative Syndrome Scale, Positive Subscale (PANSS-P).
Sixty-five subjects were randomized and 48 completed the 4-month study. Significantly greater improvement in symptoms was observed in subjects receiving risperidone compared to placebo on the CAPS-total and CAPS-D subscale scores and also on HAM-A and PANSS-P. Numerically greater improvements in all the remaining measures were noted with risperidone, but the differences did not reach statistical significance. Risperidone was well tolerated.
These results suggest that adjunctive risperidone improved a broad range of psychiatric symptoms in patients with chronic combat-related PTSD. The data support the concept that atypical antipsychotic medications may have a wider therapeutic spectrum that goes beyond the treatment of psychosis.
"This lack of a consistently successful primary medication regimen has led to the testing of adjunctive antipsychotic treatment as a strategy to address refractory PTSD symptoms. Adjunctive use of several second-generation antipsychotic medications (olanzapine, risperidone, quetiapine , aripiprazole) has shown efficacy in the treatment of PTSD in a number of small studies (Stein et al., 2002; Hamner et al., 2003; Monnelly et al., 2003; Reich et al., 2004; Bartzokis et al., 2005; Ahearn et al., 2006; Rothbaum et al., 2008; Robert et al., 2009). However, a randomized controlled trial of adjunctive risperidone for PTSD was largely (but not entirely) negative (Krystal et al., 2011). "
[Show abstract][Hide abstract] ABSTRACT: Many individuals with post-traumatic stress disorder (PTSD) experience persistent symptoms despite pharmacological treatment with antidepressants. Several open-label monotherapy and adjunctive studies have suggested that aripiprazole (a second-generation antipsychotic) may have clinical utility in PTSD. However, there have been no randomized placebo-controlled trials of aripiprazole use for PTSD. We thus conducted a pilot randomized controlled trial of adjunctive aripiprazole versus placebo among Veterans with chronic PTSD serving in the US military since 11 September 2001 to assess the feasibility, safety, tolerability, and therapeutic potential of aripiprazole. Sixteen Veterans were randomized, and 14 completed at least 4 weeks of the study; 12 completed the entire 8-week trial. Outcome measures included the Clinician-Administered PTSD Scale (CAPS), PTSD Checklist, Beck Depression Inventory, Second Edition, and Positive and Negative Syndrome Scale scores. Aripiprazole was well-tolerated in this cohort, and improvements in CAPS, PTSD Checklist, Beck Depression Inventory, Second Edition, and Positive and Negative Syndrome Scale scores were as hypothesized. Although CAPS change scores did not reach statistical significance, aripiprazole outperformed placebo by 9 points on the CAPS in the last observation carried forward analysis compared with the placebo group (n=7 per group), and by 20 points in the group randomized to aripiprazole that completed the entire study (n=5) compared with the placebo group (n=7). Results suggest promise for aripiprazole as an adjunctive strategy for the treatment of PTSD.
International Clinical Psychopharmacology 02/2015; 30(3). DOI:10.1097/YIC.0000000000000061 · 2.46 Impact Factor
"), which was the most frequently used assessment tool in the included RCTs of PTSD (Bartzokis et al., 2005; Carey et al., 2012; Hamner et al., 2003; Krystal et al., 2011; Padala et al., 2006; Reich et al., 2004; Stein et al., 2002). The change from baseline of total scores on the self-reported Davidson Trauma Scale (DTS) (Davidson et al., 1997) was also included as a primary efficacy measure. "
[Show abstract][Hide abstract] ABSTRACT: Despite the fact that the majority of currently available treatment guidelines propose antidepressants as the first-line pharmacological therapy for posttraumatic stress disorder (PTSD), a substantial portion of patients fail to show an adequate response following this type of treatment. In this context, a number of small, open-label studies and randomized controlled clinical trials (RCTs) have found atypical antipsychotics (AAs) to be a beneficial treatment for patients with PTSD. Thus, the present meta-analysis was conducted to enhance the sample size power and further the current understanding of the role of AAs for the treatment of PTSD. An extensive search of several databases identified 12 appropriate RCTs and available data from 9 of these (n = 497) were included in the final meta-analysis. AAs may have potential benefits for the treatment of PTSD as indicated by changes from baseline of the total score on the Clinician Administered PTSD Scale (CAPS; standardized mean difference [SMD] = -0.289, 95% confidence intervals [CIs] = -0.471, -0.106), P = 0.002). Additionally, AAs were found to be significantly more effective (P < 0.0001) than a placebo in terms of change from baseline for the intrusion sub-score on the CAPS (SMD = -0.373, 95% CIs = -0.568, -0.178) but there were no significant reductions for the avoidance and hyperarousal sub-symptoms. The responder rate and rate of improvement of depressive symptoms were also significantly higher in the AA group than the placebo group (P = 0.004 and P < 0.0001, respectively). However, the present results should be interpreted carefully and be translated into clinical practice only with due consideration of the limited quality and quantity of existing RCTs included in this analysis.
Journal of Psychiatric Research 05/2014; 56(1). DOI:10.1016/j.jpsychires.2014.05.003 · 3.96 Impact Factor
"Risperidone was shown to be superior to placebo in reducing overall PTSD severity     in four out of seven RCTs while other authors failed to find significant differences   . It must be noted, however, that two out of three of the studies that yielded negative results investigated samples   that were composed exclusively by war veterans, a population that is characterized by high levels of refractoriness . "
[Show abstract][Hide abstract] ABSTRACT: Introduction: Post-traumatic stress disorder (PTSD) is a frequent and disabling condition that occurs after exposure to a traumatic event, and Selective Serotonin Reuptake Inhibitors (SSRIs) are considered the first-line treatment approach for this disorder. However, a large proportion of patients remain symptomatic and other pharmacological agents have been investigated, based on the understanding of the underlying biological dysfunctions of PTSD. Methods: We conducted a review of the literature on the pharmacological options for PTSD other than the antidepressants, using MedLine and Web of Science databases, with search terms including the pharmacologic class of each agent plus PTSD, or pharmacotherapy, or fear conditioning. The literature review covered articles published until august 2012, including reviews and original articles. Results: Agents like antipsychotics, anticonvulsants, benzodiazepines, anti-adrenergic agents, have been studied in randomized clinical trials (RCTs), with general positive results for antipsychotics, especially as adjunct therapy, and for prazosin for sleep-related disturbances. However, one important target for novel medications is the modulation of the fear conditioning process, through the alteration of retrieval/reconsolidation or enhancement of fear extinction. This is traditionally targeted in prolonged exposure therapy, but pre-clinical findings from studies investigating agents like propanolol, clonidine, N-Methyl-D-aspartic Acid Receptor (NMDAR) compounds, 3,4-methylenedioxy-N-methylamphetamine (MDMA) and cannabinoids, indicate promising results in affecting the fear conditioning process and thus improving PTSD core symptoms. Discussion: Antipsychotics can be considered a reasonable alternative option to PTSD, with the largest body of evidence for risperidone, even though larger RCTs are warranted. Prazosin is also a promising agent, especially for sleep-related disturbances, while anticonvulsants and benzodiazepines lack empirical support. However, the most promising area for pharmacotherapy in PTSD is the modulation of the fear conditioning process, through agents used in adjunct to exposure therapy.
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