Posttraumatic Growth After MDMA‐Assisted Psychotherapy for Posttraumatic Stress Disorder

3,4‐Methylenedioxymethamphetamine (MDMA)–assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self‐perception, interpersonal relationships, or philosophy o...

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Published inJournal of traumatic stress Vol. 33; no. 2; pp. 161 - 170
Main Authors Gorman, Ingmar, Belser, Alexander B., Jerome, Lisa, Hennigan, Colin, Shechet, Ben, Hamilton, Scott, Yazar‐Klosinski, Berra, Emerson, Amy, Feduccia, Allison A.
Format Journal Article
LanguageEnglish
Published United States Wiley Subscription Services, Inc 01.04.2020
John Wiley and Sons Inc
Subjects
Online AccessGet full text
ISSN0894-9867
1573-6598
1573-6598
DOI10.1002/jts.22479

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Abstract 3,4‐Methylenedioxymethamphetamine (MDMA)–assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self‐perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data (n = 60) were pooled from three Phase 2 clinical studies employing triple‐blind crossover designs. Participants were required to meet DSM‐IV‐R criteria for PTSD with a score higher than 50 on the Clinician‐Administered PTSD Scale (CAPS‐IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75–125 mg of MDMA; n = 45) or placebo/active control (0–40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS‐IV, which were administered at baseline, primary endpoint, treatment exit, and 12‐month follow‐up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges’ g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges’ g = 0.88, 95% CI [−0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12‐month follow‐up, within‐subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two‐thirds of participants (67.2%) no longer met criteria for PTSD. MDMA‐assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large‐magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study.
AbstractList 3,4‐Methylenedioxymethamphetamine (MDMA)–assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self‐perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data (n = 60) were pooled from three Phase 2 clinical studies employing triple‐blind crossover designs. Participants were required to meet DSM‐IV‐R criteria for PTSD with a score higher than 50 on the Clinician‐Administered PTSD Scale (CAPS‐IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75–125 mg of MDMA; n = 45) or placebo/active control (0–40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS‐IV, which were administered at baseline, primary endpoint, treatment exit, and 12‐month follow‐up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges’ g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges’ g = 0.88, 95% CI [−0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12‐month follow‐up, within‐subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two‐thirds of participants (67.2%) no longer met criteria for PTSD. MDMA‐assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large‐magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study.
3,4‐Methylenedioxymethamphetamine (MDMA)–assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self‐perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data ( n = 60) were pooled from three Phase 2 clinical studies employing triple‐blind crossover designs. Participants were required to meet DSM‐IV‐R criteria for PTSD with a score higher than 50 on the Clinician‐Administered PTSD Scale (CAPS‐IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75–125 mg of MDMA; n = 45) or placebo/active control (0–40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS‐IV, which were administered at baseline, primary endpoint, treatment exit, and 12‐month follow‐up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges’ g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges’ g = 0.88, 95% CI [−0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12‐month follow‐up, within‐subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two‐thirds of participants (67.2%) no longer met criteria for PTSD. MDMA‐assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large‐magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study. Spanish Abstracts by Asociación Chilena de Estrés Traumático (ACET) Crecimiento Postraumático después de la Psicoterapia Asistida por MDMA para el Trastorno de Estrés Postraumático CRECIMIENTO POSTRAUMÁTICO DESPUÉS DE LA PSICOTERAPIA ASISTIDA CON MDMA Se ha demostrado que la psicoterapia asistida con 3,4‐metilendioximetanfetamina (MDMA)‐ para el trastorno de estrés postraumático (TEPT) reduce significativamente la sintomatología clínica, pero el crecimiento postraumático (CPT), que consiste en cambios positivos en la autopercepción, las relaciones interpersonales o la filosofía de vida, no se ha estudiado con este tratamiento. Datos del participante (n = 60) se combinaron de tres estudios clínicos de fase 2 que emplearon diseños cruzados de triple ciego. Los participantes debían cumplir con los criterios del DSM‐IV‐R para TEPT con una puntuación superior a 50 en la Escala de TEPT administrada por el médico (CAPS‐IV en su sigla en inglés), así como una respuesta inadecuada previa al tratamiento farmacológico y / o psicoterapéutico. Los datos se agruparon en dos grupos: un grupo de dosis de MDMA activa (75‐125 mg de MDMA; n = 45) o placebo / control activo (0‐40 mg de MDMA; n = 15). Las medidas incluyeron el Inventario de crecimiento postraumático (PTGI en su sigla en inglés) y el CAPS‐IV, que se administraron al inicio, el punto final primario, la salida del tratamiento y el seguimiento a los 12 meses. En la evaluación al punto final primario, el grupo de MDMA demostró más PTG, g de Hedges = 1,14, IC del 95% [0,49, 1,78], p <0,001; y una mayor reducción en la gravedad de los síntomas del TEPT, g de Hedges = 0,88, IC del 95% [‐ 0,28, 1,50], p <0,001, en relación con el grupo de control. En relación con la evaluación inicial, a los 12 meses de seguimiento, la PTG intraindividual fue mayor, p <0,001; las puntuaciones de gravedad de los síntomas del TEPT fueron más bajas, p <0,001; y dos tercios de los participantes (67,2%) ya no cumplían con los criterios de TEPT. La psicoterapia asistida con MDMA para el TEPT resultó en reducciones de PTG y síntomas clínicos de gran magnitud del efecto. Los resultados sugieren que la PTG puede proporcionar un nuevo mecanismo de acción que justifica un estudio adicional. 簡體及繁體中文撮要由亞洲創傷心理研究學會翻譯 JOTS‐19‐0080.R2 Gorman Posttraumatic Growth after MDMA‐Assisted Psychotherapy for Posttraumatic Stress Disorder Traditional Chinese 標題: 治療創傷後壓力症的MDMA輔助心理治療產生的創傷後成長 撮要: 過往研究顯示, 為治療創傷後壓力症(PTSD)的3,4‐亞甲二氧甲基苯丙胺 (簡稱「MDMA」) 輔助心理治療, 能顯著減輕患者的臨床症狀。可是, 過往研究並未有檢視這種治療裡的創傷後成長 (PTG), 其包括自我感知、人際關係或人生哲學的正向改變。我們從3個採用三盲交叉試驗設計的第二階段臨床研究抽取樣本數據(n = 60)。樣本必須符合DSM‐IV‐R的PTSD準則, 並在臨床治療師執行的PTSD量表(CAPS‐IV)中分數超過50, 而且過往接受藥物和/或心理治療取得的成果不足。我們把數據綜合為兩組:活性MDMA藥物組(使用75–125 mg 的MDMA; n = 45), 和安慰劑/活性對照組(使用0–40 mg的MDMA; n = 15)。我們以創傷後成長量表(PTGI)與CAPS‐IV, 分別於基線、主要療效指標(primary endpoint)時點、終止治療時及終止治療12個月後, 對樣本進行測量。與對照組相比, MDMA藥物組在主要療效指標時點展現更高水平的PTG (Hedges’ g = 1.14, 95% CI [0.49, 1.78], p < .001) , PTSD症狀嚴重度亦有較大幅度的改善 (Hedges’ g = 0.88, 95% CI [‐ 0.28, 1.50], p < .001) 。與基線相比, 樣本在終止治療12個月後, 個人的PTG水平較高 (p < .001) , PTSD症狀嚴重度分數較低 (p < .001) , 三分之二的樣本(67.2%)不再符合患PTSD。為治療PTSD的MDMA輔助心理治療能令樣本產生PTG, 帶來的臨床症狀改善效應量大。結果反映, PTG可能是新型療法的機制, 未來需有更多研究關注。 Simplified Chinese 标题: 治疗创伤后压力症的MDMA辅助心理治疗产生的创伤后成长 撮要: 过往研究显示, 为治疗创伤后压力症(PTSD)的3,4‐亚甲二氧甲基苯丙胺 (简称「MDMA」) 辅助心理治疗, 能显著减轻患者的临床症状。可是, 过往研究并未有检视这种治疗里的创伤后成长 (PTG), 其包括自我感知、人际关系或人生哲学的正向改变。我们从3个采用三盲交叉试验设计的第二阶段临床研究抽取样本数据(n = 60)。样本必须符合DSM‐IV‐R的PTSD准则, 并在临床治疗师执行的PTSD量表(CAPS‐IV)中分数超过50, 而且过往接受药物和/或心理治疗取得的成果不足。我们把数据综合为两组:活性MDMA药物组(使用75–125 mg 的MDMA; n = 45), 和安慰剂/活性对照组(使用0–40 mg的MDMA; n = 15)。我们以创伤后成长量表(PTGI)与CAPS‐IV, 分别于基线、主要疗效指标(primary endpoint)时点、终止治疗时及终止治疗12个月后, 对样本进行测量。与对照组相比, MDMA药物组在主要疗效指标时点展现更高水平的PTG (Hedges’ g = 1.14, 95% CI [0.49, 1.78], p < .001) , PTSD症状严重度亦有较大幅度的改善 (Hedges’ g = 0.88, 95% CI [‐ 0.28, 1.50], p < .001) 。与基线相比, 样本在终止治疗12个月后, 个人的PTG水平较高 (p < .001) , PTSD症状严重度分数较低 (p < .001) , 三分之二的样本(67.2%)不再符合患PTSD。为治疗PTSD的MDMA辅助心理治疗能令样本产生PTG, 带来的临床症状改善效应量大。结果反映, PTG可能是新型疗法的机制, 未来需有更多研究关注。
3,4‐Methylenedioxymethamphetamine (MDMA)–assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self‐perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data ( n = 60) were pooled from three Phase 2 clinical studies employing triple‐blind crossover designs. Participants were required to meet DSM‐IV‐R criteria for PTSD with a score higher than 50 on the Clinician‐Administered PTSD Scale (CAPS‐IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75–125 mg of MDMA; n = 45) or placebo/active control (0–40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS‐IV, which were administered at baseline, primary endpoint, treatment exit, and 12‐month follow‐up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges’ g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges’ g = 0.88, 95% CI [−0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12‐month follow‐up, within‐subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two‐thirds of participants (67.2%) no longer met criteria for PTSD. MDMA‐assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large‐magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study.
3,4-Methylenedioxymethamphetamine (MDMA)-assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self-perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data (n = 60) were pooled from three Phase 2 clinical studies employing triple-blind crossover designs. Participants were required to meet DSM-IV-R criteria for PTSD with a score higher than 50 on the Clinician-Administered PTSD Scale (CAPS-IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75-125 mg of MDMA; n = 45) or placebo/active control (0-40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS-IV, which were administered at baseline, primary endpoint, treatment exit, and 12-month follow-up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges' g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges' g = 0.88, 95% CI [-0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12-month follow-up, within-subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two-thirds of participants (67.2%) no longer met criteria for PTSD. MDMA-assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large-magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study.3,4-Methylenedioxymethamphetamine (MDMA)-assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self-perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data (n = 60) were pooled from three Phase 2 clinical studies employing triple-blind crossover designs. Participants were required to meet DSM-IV-R criteria for PTSD with a score higher than 50 on the Clinician-Administered PTSD Scale (CAPS-IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75-125 mg of MDMA; n = 45) or placebo/active control (0-40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS-IV, which were administered at baseline, primary endpoint, treatment exit, and 12-month follow-up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges' g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges' g = 0.88, 95% CI [-0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12-month follow-up, within-subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two-thirds of participants (67.2%) no longer met criteria for PTSD. MDMA-assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large-magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study.
3,4-Methylenedioxymethamphetamine (MDMA)-assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical symptomatology, but posttraumatic growth (PTG), which consists of positive changes in self-perception, interpersonal relationships, or philosophy of life, has not been studied with this treatment. Participant data (n = 60) were pooled from three Phase 2 clinical studies employing triple-blind crossover designs. Participants were required to meet DSM-IV-R criteria for PTSD with a score higher than 50 on the Clinician-Administered PTSD Scale (CAPS-IV) as well as previous inadequate response to pharmacological and/or psychotherapeutic treatment. Data were aggregated into two groups: an active MDMA dose group (75-125 mg of MDMA; n = 45) or placebo/active control (0-40 mg of MDMA; n = 15). Measures included the Posttraumatic Growth Inventory (PTGI) and the CAPS-IV, which were administered at baseline, primary endpoint, treatment exit, and 12-month follow-up. At primary endpoint, the MDMA group demonstrated more PTG, Hedges' g = 1.14, 95% CI [0.49, 1.78], p < .001; and a larger reduction in PTSD symptom severity, Hedges' g = 0.88, 95% CI [-0.28, 1.50], p < .001, relative to the control group. Relative to baseline, at the 12-month follow-up, within-subject PTG was higher, p < .001; PTSD symptom severity scores were lower, p < .001; and two-thirds of participants (67.2%) no longer met criteria for PTSD. MDMA-assisted psychotherapy for PTSD resulted in PTG and clinical symptom reductions of large-magnitude effect sizes. Results suggest that PTG may provide a new mechanism of action warranting further study.
Author Gorman, Ingmar
Belser, Alexander B.
Jerome, Lisa
Hennigan, Colin
Feduccia, Allison A.
Shechet, Ben
Hamilton, Scott
Emerson, Amy
Yazar‐Klosinski, Berra
AuthorAffiliation 4 Scottsdale Research Institute Phoenix Arizona USA
5 Stanford University School of Medicine Stanford University Stanford California USA
1 Rory Meyers College of Nursing New York University New York New York USA
3 MAPS Public Benefit Corporation Santa Cruz California USA
2 School of Medicine Yale University New Haven Connecticut USA
6 Multidisciplinary Association for Psychedelic Studies Santa Cruz California USA
AuthorAffiliation_xml – name: 3 MAPS Public Benefit Corporation Santa Cruz California USA
– name: 2 School of Medicine Yale University New Haven Connecticut USA
– name: 4 Scottsdale Research Institute Phoenix Arizona USA
– name: 5 Stanford University School of Medicine Stanford University Stanford California USA
– name: 1 Rory Meyers College of Nursing New York University New York New York USA
– name: 6 Multidisciplinary Association for Psychedelic Studies Santa Cruz California USA
Author_xml – sequence: 1
  givenname: Ingmar
  surname: Gorman
  fullname: Gorman, Ingmar
  email: ingmar.gorman@gmail.com
  organization: New York University
– sequence: 2
  givenname: Alexander B.
  surname: Belser
  fullname: Belser, Alexander B.
  organization: Yale University
– sequence: 3
  givenname: Lisa
  surname: Jerome
  fullname: Jerome, Lisa
  organization: MAPS Public Benefit Corporation
– sequence: 4
  givenname: Colin
  surname: Hennigan
  fullname: Hennigan, Colin
  organization: MAPS Public Benefit Corporation
– sequence: 5
  givenname: Ben
  surname: Shechet
  fullname: Shechet, Ben
  organization: Scottsdale Research Institute
– sequence: 6
  givenname: Scott
  surname: Hamilton
  fullname: Hamilton, Scott
  organization: Stanford University
– sequence: 7
  givenname: Berra
  surname: Yazar‐Klosinski
  fullname: Yazar‐Klosinski, Berra
  organization: Multidisciplinary Association for Psychedelic Studies
– sequence: 8
  givenname: Amy
  surname: Emerson
  fullname: Emerson, Amy
  organization: MAPS Public Benefit Corporation
– sequence: 9
  givenname: Allison A.
  surname: Feduccia
  fullname: Feduccia, Allison A.
  organization: MAPS Public Benefit Corporation
BackLink https://www.ncbi.nlm.nih.gov/pubmed/32073177$$D View this record in MEDLINE/PubMed
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Copyright 2020 Multidisciplinary Association for Psychedelic Studies, Inc. published by Wiley Periodicals, Inc. on behalf of International Society for Traumatic Stress Studies
2020 Multidisciplinary Association for Psychedelic Studies, Inc. Journal of Traumatic Stress published by Wiley Periodicals, Inc. on behalf of International Society for Traumatic Stress Studies.
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2020 Multidisciplinary Association for Psychedelic Studies, Inc. Journal of Traumatic Stress published by Wiley Periodicals, Inc. on behalf of International Society for Traumatic Stress Studies.
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
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Notes This work was supported in part by The Multidisciplinary Association for Psychedelic Studies (MAPS), a nonprofit organization. The authors wish to express their gratitude to the individuals who participated in these three studies for committing to the deep and difficult journey of healing; the therapists, Michael Mithoefer, Ann Mithoefer, Marcela Ot'alora, Bruce Poulter, Will Van Derveer, Jim Grigsby, Saj Razvi, Sandra Van Der Veer, Sara Gael Giron, Alison McQueen, Ingrid Pacey, and Hayden Rubensohn, who supported participants throughout their time in the studies; the study coordinators, Sarah Sadler, Peggy Ivers, and Katrina Blommaert, who provided organization and support; Michael Mithoefer, Annie Mithoefer, and Marcela Ot'alora for training therapists; the independent raters, Joy Wymer, Mark Wagner, Carla Clements, Kathryn Kaye, and Zach Walsh; the independent rater intern, Matthew Campeau; the study pharmacists, Kimm Singer, Mel Rauton and Colin Holyk; the clinical research associates, Rebecca Matthews, Charlotte Harrison, and Elizabeth Heimler, who monitored data collection; the adherence raters, who assessed adherence to the manualized therapy; the night attendants, who cared for participants during their overnight stays; and all of the other volunteers, who tirelessly supported the study. The sponsor played a role in the study design, data analysis, and writing of the report (the authors performed all data analyses). Two authors, Ingmar Gorman and Alexander B. Belser, receive consultation fees from Akeso Therapeutics as Coclinical Investigator and Subinvestigator, respectively, for a clinical trial site for the open label multisite study of safety and effects of MDMA‐assisted psychotherapy for treatment of PTSD (ClinicalTrials.gov identifier NCT03282123).
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Snippet 3,4‐Methylenedioxymethamphetamine (MDMA)–assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical...
3,4-Methylenedioxymethamphetamine (MDMA)-assisted psychotherapy for posttraumatic stress disorder (PTSD) has been shown to significantly reduce clinical...
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StartPage 161
SubjectTerms Adult
Ecstasy
Female
Humans
Male
Middle Aged
N-Methyl-3,4-methylenedioxyamphetamine - administration & dosage
Non-Randomized Controlled Trials as Topic
Post traumatic stress disorder
Post-traumatic growth
Posttraumatic Growth, Psychological - drug effects
Psychotherapy
Psychotherapy - methods
Severity of Illness Index
Stress Disorders, Post-Traumatic - therapy
Title Posttraumatic Growth After MDMA‐Assisted Psychotherapy for Posttraumatic Stress Disorder
URI https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fjts.22479
https://www.ncbi.nlm.nih.gov/pubmed/32073177
https://www.proquest.com/docview/2392060322
https://www.proquest.com/docview/2358572951
https://pubmed.ncbi.nlm.nih.gov/PMC7216948
Volume 33
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