Written Exposure in Substance Treatment (WEST 3.0): randomized Controlled Trial

The purpose of the current research study is to evaluate the efficacy of the refinedWritten Exposure in Substance Treatment (WEST) for PTSD among residential SUD patientsthrough a randomized controlled trial. All participants meet criteria for PTSD and are ina short term residential SUD treatment program (target residential treatment duration =28 days) regardless of the research. Participants will be randomly assigned to WEST +treatment as usual (TAU) or TAU only. The primary outcome is change in PTSD symptoms frompre‐intervention to post‐intervention. The secondary outcome will be change in SUDoutcomes (e.g., treatment completion, reduced opioid and other drug use) and change innon‐PTSD mental health outcomes (e.g., depression) from pre‐intervention topost‐intervention.