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Martin Krsak

4 papers in the library · 1 citation · publishing 2025-2026

Papers

Ketamine-Assisted Group Therapy for Work-Related Stress in First Responders and Frontline Health Care Workers

Psychedelic Medicine April 21, 2025 Luke Flynn, Mary Rondeau, Martin Krsak et al. 1 citation

A 6-week community-based group ketamine-assisted psychotherapy (KAP) program reduced symptoms of trauma, anxiety, and depression in a sample of 16 first responders and frontline health care workers experiencing work-related stress. Participants completed the program in small groups of three to six. Pre- and post-treatment comparisons using standardized measures showed significant reductions in trauma, anxiety, and depression scores. The findings suggest that group KAP may be a useful treatment for work-related stress, though further formal evaluation is needed.

Conceptual analysis of mechanisms and methods in psychedelic clinical trial design: a narrative review

Therapeutic Advances in Psychopharmacology July 1, 2026 Martin Krsak, David Sparrow, Bernard Rosner et al.

Clinical trials of psychedelic-assisted therapy face unique challenges beyond those of typical pharmacotherapeutics. The therapeutic container—including preparatory and integrative psychotherapy and supportive dosing sessions—likely affects outcomes, and the therapeutic relationship between subjects and therapists is more impactful than in drug-only trials. The most critical problem is the inability to maintain effective blinding in placebo-controlled settings; all attempted approaches have resulted in significant functional unblinding. This makes it difficult to separate the true therapeutic effect of the psychedelic plus psychotherapy from positive expectancy in active subjects and negative expectancy in placebo subjects. Functional unblinding may be deeply connected to the mechanism of therapeutic action itself. The manuscript discusses advantages and disadvantages of current approaches and proposes conceptual and methodological perspectives.

Ketamine-assisted psychotherapy for posttraumatic stress disorder: a systematic review and individual participant data meta-analysis of predictors of treatment effects.

Psychotherapy and Psychosomatics June 19, 2026 Judith Rohde, Tyler M Moore, Kathryn Walker et al.

A systematic review and individual participant data meta-analysis of 12 studies (533 participants) found that higher baseline PTSD severity was the most robust predictor of symptom reduction after combined ketamine and psychotherapy. More psychotherapy sessions, more ketamine sessions, and shorter treatment duration were also associated with greater improvement, but these findings are tentative because most studies were of poor quality. The analysis showed that for each additional psychotherapy session, PTSD symptoms improved by an average of 1.03 points on the PCL-5, and for each additional ketamine session, improvement was 1.15 points. The results require confirmation in well-designed prospective trials.

Treating job-related stress with psychedelic group therapy: a case series on group ketamine-assisted psychotherapy for healthcare workers and first responders

Therapeutic Advances in Psychopharmacology October 1, 2025 Luke Flynn, Martin Krsak, Mary Rondeau et al.

A group ketamine-assisted psychotherapy program for frontline healthcare workers and first responders reduced symptoms of anxiety, depression, trauma, and burnout. Median scores on the GAD-7 (anxiety) dropped from 9.5 to 6, PHQ-9 (depression) from 12 to 5, and PCL-5 (trauma) from 27 to 10, all with statistically significant improvements. The Maslach Burnout Inventory also improved across all subcomponents. The seven-week program included three ketamine sessions and four group psychotherapy sessions. Adverse events were rare, suggesting this model may be a viable intervention for job-related stress, though larger controlled studies are needed.