From therapeutic promise to evidentiary discipline: Reassessing MDMA‐assisted psychotherapy for posttraumatic stress disorder

In this commentary on Morland et al. (2026)'s recent State of the Science article on 3,4-methylenedioxymethamphetamine (MDMA)-assisted psychotherapy for posttraumatic stress disorder (PTSD), we aim to emphasize both MDMA's therapeutic promise and its unresolved scientific challenges. Although recent trials on MDMA-assisted interventions have reported encouraging reductions in PTSD symptoms, the current evidence base remains constrained by several major limitations, including difficulties in blinding, expectancy effects, the absence of robust active comparator conditions, limited mechanistic clarity, and concerns regarding safety monitoring and sample generalizability. This letter argues that these issues are not peripheral but central to the interpretation and future translation of MDMA-assisted psychotherapy. It further highlights the need to move beyond symptom reduction as the primary outcome and incorporate broader indicators of recovery, such as functioning, quality of life, relational restoration, and long-term durability of treatment gains. In addition, we call for stronger attention to equity, scalability, therapist training, and ethical safeguards, particularly if MDMA-assisted psychotherapy is to be considered within a global mental health framework. The discussion aims to stimulate deeper debate on how innovation in trauma treatment should be evaluated before widespread clinical adoption.