3 papers and 1 clinical trial exploring nitrous oxide as a treatment for treatment-resistant depression (trd).
Nitrous oxide (N₂O) is a rapid-acting NMDA receptor antagonist with emerging evidence for antidepressant efficacy in treatment-resistant depression. Delivered as a 50% N₂O/50% O₂ inhalation mixture over one-hour sessions, it produces rapid mood improvements that can persist for days to weeks. Its established safety record in anesthesia, short session duration, minimal recovery time, and low cost position it as a potentially scalable alternative to IV ketamine and esketamine, though the psychiatric evidence base remains early-stage and no formal psychiatric indication exists. Key open questions include optimal dosing frequency, long-term durability, and the mechanism by which NMDA antagonism without intense psychedelic phenomenology produces antidepressant effects.
Full Nitrous Oxide profileResearch into psychedelics as a treatment for Treatment-Resistant Depression (TRD) is advancing rapidly, with compounds like psilocybin showing particular promise. Approximately 30% of depression sufferers experience TRD, which reflects a significant unmet need in mental health treatment.
Full Treatment-Resistant Depression (TRD) profile