06/13/2026
A phase 2a open-label trial published in the Journal of Clinical Psychiatry tested inhaled 5-MeO-DMT (GH001) in ten women with moderate-to-severe postpartum depression.
Using an individualised dosing regimen of up to three escalating doses (6mg, 12mg, 18mg) on a single day, researchers found a mean MADRS reduction of 35.4 points by day 8, corresponding to approximately 96% symptom reduction.
All ten patients achieved full remission, with effects observable just two hours post-dose. Maternal functioning improved by 56%. Suicidal ideation dropped from three patients to zero by discharge. No serious adverse events were reported and all patients were discharged the same day.
Breast milk analysis in lactating patients showed mebufotenin cleared within approximately eight hours. The compound acts as a nonselective serotonin agonist with preferential 5-HT1A affinity and a short plasma half-life, producing a psychoactive window of roughly 20 to 25 minutes per dose.
No psychotherapy was included. Limitations include small sample size, no control arm, and one-week follow-up.
Source: Johnson M et al. Inhaled mebufotenin (GH001) for adult patients with postpartum depression: a phase 2a open-label clinical trial. J Clin Psychiatry. 2026;87(3):25m16284.