An interventional study of Written Exposure Therapy and Treatment as Usual in Posttraumatic Stress Disorder and Substance Use Disorders, sponsored by Potomac Health Foundations. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-29.
Sponsored by Potomac Health Foundations · Not applicable, Interventional, and Treatment
The purpose of this pilot non-randomized, uncontrolled clinical trial is to test the feasibility and efficacy of written exposure therapy (WET) for posttraumatic stress disorder (PTSD) as adapted for use within the context of residential substance use disorder (SUD) treatment. All participants meet criteria for PTSD and are in a short term residential SUD treatment program (target residential treatment duration = 28 days) regardless of the research. The main question the study aims to answer is: 1) Is the delivery of adapted WET feasible and acceptable in short term residential SUD treatment for individuals with severe SUD?
2,682 studies on the registry are indexed under Stress Disorders, Post-Traumatic; 601 are open to participants now.
This study's enrollment of 26 is below the median of 69 across 2,196 interventional studies indexed under Stress Disorders, Post-Traumatic.
Browse Stress Disorders, Post-Traumatic studies →Potomac Health Foundations is the lead sponsor of 9 studies on the registry; 4 are open to participants now.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
DSM diagnostic criteria
The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants in this condition receive everything included in TAU plus 5 individual sessions of WET delivered by a therapist. WET has been adapted for delivery in a residential SUD setting according to expert feedback. Sessions average less than 60 minutes and primarily involve writing about the traumatic experience that is guided by the therapist.
Behavioral: Written Exposure Therapy · Behavioral: Treatment as Usual
Written Exposure Therapy is a brief, evidenced based intervention for PTSD. WET is generally delivered individually across 5 sessions in which the therapist guides the patient through writing exercises. Across exposure sessions, participants experience habituation so that their symptoms decrease by the end of treatment. WET has an established evidence base in general outpatient psychotherapy for PTSD, but has not been adapted or tested in residential SUD treatment settings. Further, the investigators have adapted WET for this setting based on stakeholder and expert feedback.
Treatment as Usual will include a variety of standard care services offered in short term residential treatment. For example, participants receiving TAU will participate in individual case management/general counseling sessions focused on substance use disorder and its consequences, group based psychoeducation sessions, group based counseling sessions (e.g., relapse prevention planning), individual services with a medical provider and pharmacotherapy (e.g., for withdrawal, relapse prevention, or co-occurring conditions)
PTSD symptom reduction
PTSD symptom reduction pre/post intervention by treatment arm as measured by the posttraumatic checklist for DSM-5 (PCL-5). The PCL-5 is a self-report questionnaire yielding scores ranging from 0-80 with higher scores indicating greater symptomology.
Time frame: Pre-WEST intervention; post-WEST intervention (approximately 14 days after randomization, but will vary based on when participants complete the intervention); 4-weeks post enrollment; 8-weeks post enrollment; 12-weeks post enrollment.
Feasibility of WET delivered in residential SUD treatment context
Percentage of participants in the WET arm who were able to complete the treatment (5 sessions) prior to discharge
Time frame: Up to 4 weeks, or until the participant discharges from residential treatment (whichever comes first).
Acceptability of WET delivered in residential SUD treatment context
Treatment satisfaction scores among WET participants as measured by the 2-part credibility/expectancies questionnaire (CEQ). The CEQ utilizes two scoring systems that range from 1-9 or 0%-100%. with higher scores indicating greater acceptability.
Time frame: Collected post intervention window (approximately 3 weeks from enrollment)
Plan to share: Yes — IPD may be shared with other researchers through a de-identified, secure, electronic data transfer as allowed by the IRB and other regulatory authorities.
Time frame: Interested individuals may inquire after data lock is achieved and the primary outcomes paper has been published from this dataset. Estimated time: 2026
Ran from Nov 2025 to primary completion in Jun 2026, 7 months.
Of 1,064 non-industry interventional studies with no phase under Stress Disorders, Post-Traumatic, half reached primary completion within 35 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 53. This study's 7 months is below that.
Counting every sponsor, half of 1,092 studies reached it within 34 months; a quarter within 17 and three quarters within 53.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Jun 2026. You cannot join it, but the record below documents what was studied.
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Stress Disorders, Post-Traumatic →
Potomac Health Foundations