In brief
- A randomized trial from Columbia University finds that ketamine increases next-morning cortisol levels in people with depression and suicidal ideation.
- Larger increases tended to accompany greater reductions in suicidal thoughts the next day, but this association did not reach conventional statistical significance.
- The group receiving midazolam, the active control drug, showed no such hormonal rebound.
A team from the Columbia University Medical Center and the New York State Psychiatric Institute has found that a single ketamine infusion elevates next-morning cortisol in patients hospitalized for depression with active suicidal ideation, although the association between that surge and improvement in those thoughts did not reach statistical significance. The finding, published in the Journal of Affective Disorders, is exploratory, and the authors themselves urge caution before drawing firm conclusions.
How the study was conducted
Medical Xpress describes 80 people recruited to the parent trial; the inspected primary abstract does not state how many contributed complete cortisol data. The trial compared an intravenous ketamine infusion with midazolam as an active control. Saliva was collected before treatment and 24 hours later, upon waking and thirty minutes afterward.
What was found
Waking cortisol increased in the ketamine group; the report does not describe a comparable rise with midazolam. Cortisol and suicidal-ideation changes showed a small-to-moderate correlation, r = -0.25, but it was not significant at the conventional threshold, p = 0.052. The abstract calls for replication before considering cortisol a response mechanism or marker; it does not establish that cortisol causes relief.
What it implies
This exploratory analysis needs replication. The accessible abstract does not establish details of sleep control or separate all possible mechanisms. These findings do not make cortisol a clinical test or, by themselves, change treatment guidance. harm reduction still requires the same standard of care, with medical supervision in clinical settings and special attention when suicidal ideation is involved.
Source
- Sanjukta Mondal, Medical Xpress. Ketamine triggers morning cortisol surge tied to fewer suicidal thoughts—but the link remains uncertain. Journal of Affective Disorders / Medical Xpress, August 7, 2026.
Educational content written from a harm reduction perspective and with respect for individual freedom. It is not a substitute for advice from a healthcare professional and is not intended to encourage or condemn any drug use.
