Management of Adults with PTSD Part II: Drugs and Other Interventions
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DTB | Lubiprostone for chronic constipation in adults DTB CME/CPD* Management of adults with PTSD part II: drugs and other interventions Exposure to traumatic events is common, and many people experience some symptoms following such exposure. In most people, these symptoms subside within a few weeks, but for others, post-traumatic stress disorder (PTSD) develops and may be long-lasting. Part I of this article (DTB 2014; 52: 33–6) discussed the recognition of PTSD and evidence for trauma- focused psychological treatment (generally considered to be first-line treatment). Here in part II of the article, we discuss other possible second-line options: pharmacological treatments and other therapies. Pharmacological treatment of PTSD • tricyclic antidepressants (TCAs e.g. amitriptyline), • monoamine oxidase (MAO) inhibitors (e.g. phenelzine), • Pharmacological therapies that have been tried for PTSD include: • alpha-blockers (e.g. prazosin), • selective serotonin reuptake inhibitors (SSRIs e.g. paroxetine, sertraline, fluoxetine), • second-generation (atypical) antipsychotics (e.g. risperidone), • serotonin and norepinephrine reuptake inhibitors (SNRIs e.g. venlafaxine), • anticonvulsants (e.g. topiramate), • other second-generation antidepressants (e.g. bupropion, mirtazapine, • benzodiazepines (e.g. alprazolam) and trazodone), • other drugs (e.g. cycloserine).1 The British National Formulary (BNF) suggests that PTSD can be treated with SSRIs (e.g. paroxetine or sertraline).2 The National Institute for Health and Care * DTB CME/CPD A CME/CPD module based on this article is available for completion online via BMJ Excellence (NICE) evidence update of December 2013 notes that fluoxetine, Learning (learning.bmj.com) by subscribers to the online version of DTB. If prompted, venlafaxine, mirtazapine, amitriptyline, phenelzine, risperidone, topiramate, and subscribers must sign into DTB with their username and password. All users must cycloserine do not have UK marketing authorisation for use in PTSD; informed also complete a one-time registration on BMJ Learning and subsequently log in (with consent should be obtained and documented for a drug used off-label.3 Currently, a BMJ Learning username and password) on every visit. The answers to the multiple only paroxetine and sertraline are approved by the US Food and Drug choice questions will be freely available on dtb.bmj.com on publication of the next 1,4,5 issue of DTB. Administration and licensed in Europe for treatment of patients with PTSD. The drugs with UK marketing authorisation for treatment of PTSD are shown in Box 1. 44 | DTB | Vol 52 | No 4 | April 2014 dtb.bmj.com DTB | Management of adults with PTSD part II: drugs and other interventions Box 1: Drugs with UK marketing authorisation Box 2: Outcome rating scales for treatment of PTSD Clinician-Administered PTSD Scale (CAPS): Thirty-item structured Paroxetine—recommended dose is 20mg daily. If, after some weeks interview administered by a trained professional. Corresponds to on the recommended dose, insufficient response is seen, some the DSM-5 criteria for PTSD symptoms, impact on functioning, patients may benefit from having their dose increased gradually in response validity, lifetime diagnosis, and overall PTSD severity. 10mg steps up to a maximum of 50mg/day. Long-term use should be Range: 0–136 regularly evaluated.4 0–19: asymptomatic/few symptoms Sertraline—therapy should be initiated at 25mg daily. After 1 week, the dose should be increased to 50mg once daily. Patients not responding 20–39: mild PTSD/sub-threshold to a 50mg dose may benefit from dose increases. Dose changes should 40–59: moderate PTSD/threshold be made in steps of 50mg at intervals of at least 1 week, up to a maximum of 200mg/day. Changes in dose should not be made more 60–79: severe frequently than once per week given the 24-hour elimination half-life ≥80: extreme PTSD1,7,8 of sertraline.5 Hamilton Depression Rating Scale (HAMD): Seventeen-item clinician administered scale used to measure the severity of depressive In a number of studies of pharmacological interventions for PTSD, symptoms. substantial reduction in symptoms occured in the placebo treatment arms. Guidelines have suggested that although there is little difference between Range: 0–54 active therapy and placebo arms, drug therapy may still have a value in the 0–7: in the normal range (or in clinical remission) management of PTSD.6 ≥20: at least moderate severity1,9,10 Antidepressants: SSRIs and SNRIs Impact of the Event Scale-Revised (IES-R): Twenty-two-item self-report measure assessing current subjective distress for any In a systematic review, compared with placebo, paroxetine reduced specific life event. Each item rated on a scale of 0 (not at all), 1 (a little PTSD symptoms more (weighted mean difference [WMD] in Clinician- bit), 2 (moderately), 3 (quite a bit) or 4 (extremely) according to the Administered PTSD Scale [CAPS; see Box 2] –12.6, 95% CI –15.7 to –9.5, 2 past 7 days. RCTs, n=886, effect size Cohen’s d –0.49 [small to medium]) and depression symptoms more (Montgomery Åsberg Depression Rating Scale Range: 0–8811 [MADRS; see Box 2] WMD –5.7, 95% CI –7.1 to –4.3, 2 RCTs, n=886); 12.9% more people achieved remission (p=0.008, 2 RCTs, n=346, number- Montgomery Åsberg Depression Rating Scale (MADRS): Ten-item needed-to-treat [NNT]=8).1 clinician rated measure that assesses the severity of depression. The NICE 2005 analysis of sertraline (including data from six published Range: 0–60 trials and two unpublished industry trials) did not demonstrate clinically 0–6: normal/symptom absent important or statistically significant effects.21 In the later systematic review, compared with placebo, sertraline reduced PTSD symptoms (CAPS WMD 7–19: mild depression = –4.9, 95% CI –7.4 to –2.4, 7 RCTs, n 1,085, effect size Cohen’s d –0.25 [small 20–34: moderate depression to medium]) but did not significantly reduce depression symptoms (Hamilton Depression Rating Scale [HAMD; see Box 2] WMD –0.77, 95% CI >34: severe depression1,12 –2.1 to 0.55, 5 RCTs, n=1,010) or increase remission rates (24.3% vs. 19.6%, p=NS, 1 RCT, n=352).1 Posttraumatic Diagnostic Scale (PDS): Forty-nine-item self-report measure including the Posttraumatic Symptom Scale-Self Report (PSS-SR) Compared with placebo, fluoxetine reduced PTSD symptoms (CAPS WMD which has the following properties: –6.97, 95% CI –10.4 to –3.5, 4 RCTs, n=835, effect size Cohen’s d –0.31 [small to medium]) and depression symptoms (MADRS WMD –2.4, 95% CI –3.7 to 17 PTSD symptoms, each rated for severity from 0 (not at all or only one –1.1, 2 RCTs, n=712) but did not increase remission rates (13% vs. 10%, p=0.72, time) to 3 (5 or more times a week/almost always). 1 1 RCT, n=52). Range: 0–51 A second systematic review reported that paroxetine was more effective than >13 indicates likelihood of PTSD13–15 sertraline and fluoxetine in reducing symptom severity assessed using CAPS 22 score (p=0.001 and p=0.08, respectively). Short PTSD Rating Interview (SPRINT): Eight-item self-report measure In a systematic review, compared with placebo, venlafaxine ER reduced PTSD assessing the core symptoms of PTSD (intrusion, avoidance, numbing, symptoms (CAPS WMD –7.2, 95% CI –11.0 to –3.3, 2 RCTs, n=687) and arousal), somatic malaise, stress vulnerability, and role and social depression symptoms (HAMD WMD –2.08, 95% CI –3.12 to –1.04, 2 RCTs, n=687) functional impairment. Symptoms are rated on five point scales from and increased remission (risk difference 12%, 95% CI 5% to 19%, 2 RCTs, 0 (not at all) to 4 (very much). 1 n=687, NNT=9). Range: 0–32 The systematic review found that the evidence was insufficient to determine >6: symptomatic PTSD16,17 the efficacy of citalopram.1 The Committee on Safety of Medicines has reported that, as with other Structured Interview for PTSD (SIP or SI-PTSD): Seventeen items antidepressants, SSRIs and related antidepressants, especially paroxetine assessing PTSD symptoms and survival and behavioural guilt. For each and venlafaxine, are associated with withdrawal reactions, which may be item, the interviewer assigns a severity rating that reflects frequency severe. The most commonly experienced withdrawal reactions are and intensity. Items are scored on a scale from 0 (not at all) to 4 dizziness, numbness and tingling, gastrointestinal disturbances (extremely severe on a daily basis or produces so much distress that (particularly nausea and vomiting), headache, sweating, anxiety and patient cannot work or function socially). A symptom is counted as 18–20 sleep disturbances; these are less severe when the dose is tapered positive if it is rated ≥2 (moderate). gradually over a period of several weeks.23 dtb.bmj.com Vol 52 | No 4| April 2014 | DTB | 45 DTB | Management of adults with PTSD part II: drugs and other interventions Alpha blockers A systematic review found that internet-based cognitive behavioural therapy In a systematic review, compared with placebo, prazosin did not reduce PTSD (CBT) or internet-based trauma-focused writing sessions improved PTSD symptoms (CAPS WMD –8.9 95% CI –22.1 to 4.3, 2 RCTs, n=50).1 symptoms more than waiting list controls (large effect size: Cohen’s d 1.01, 95% CI 0.76 to 1.26, 5 RCTs, n=398).37 Second-generation (atypical) antipsychotics Combined pharmacological and In a systematic review, compared with placebo, risperidone had little or no psychological therapies clinically significant benefit for reduction of PTSD symptoms (CAPS WMD –4.60, 95% CI –9.0 to –0.2, 4 RCTs, n=419) and the effect on depression symptoms A systematic review included four studies that combined SSRIs with either 38 was not statistically significant (HAMD –3.7 vs.