Study Reveals Laughing Gas Offers Quick Relief for Severe Depression

Low doses of nitrous oxide, commonly known as laughing gas, may provide rapid relief from symptoms of severe depression, according to a recent study. Researchers from the University of Birmingham, the University of Oxford, and the Birmingham and Solihull Mental Health NHS Foundation Trust found that a single inhalation of nitrous oxide at a concentration of 50 percent led to significant reductions in symptoms for individuals suffering from treatment-resistant depression (TRD) and major depressive disorder (MDD).

Published in the journal eBioMedicine on November 30, 2025, the study highlighted that participants experienced a quick response, noting “rapid and significant” symptom relief within 24 hours of administration. However, the benefits were temporary, lasting approximately one week. This suggests that ongoing treatment would be necessary for most patients.

Kiranpreet Gill, a PhD researcher at the University of Birmingham, stated, “This study brings together the best possible evidence indicating that nitrous oxide has the potential to provide swift and clinically significant short-term improvements in patients with severe depression.” Gill emphasized the potential for nitrous oxide to contribute to a new generation of rapid-acting depression treatments.

While laughing gas is primarily known for its use as an anesthetic during dental and surgical procedures, it has also gained notoriety as a recreational drug. The study explored both the therapeutic effects and potential side effects of nitrous oxide, which included nausea, dizziness, and headaches; these symptoms were reported to resolve quickly without medical intervention. Researchers concluded that there were no major safety concerns associated with the short-term use of nitrous oxide, although further studies are necessary to assess its long-term effects.

The colourless gas is believed to influence mood and emotions by acting on glutamate receptors in the brain. Despite the promising results, some experts urge caution. Hamish McAllister-Williams, a professor at Newcastle University who was not involved in the research, expressed that it is premature to consider nitrous oxide a definitive treatment for depression. He noted, “Overall this review suggests that it is worthwhile looking further into whether nitrous oxide may be a treatment for depression, but that much more research is needed with larger and better designed trials before any conclusions can be drawn.”

The rising popularity of nitrous oxide as a recreational drug, particularly among young people, raises additional concerns. Recent data indicate that it is the second most commonly used drug among individuals aged 16 to 24 in the United Kingdom, following cannabis.

Depression is a significant public health issue, affecting approximately one in ten people at some stage in their lives. Symptoms can vary widely, ranging from persistent feelings of sadness and hopelessness to physical manifestations such as fatigue and sleep disturbances. In severe cases, depression can lead to suicidal thoughts, making it imperative for individuals experiencing symptoms to seek medical assistance. Effective management options may include lifestyle changes, therapy, and medication.

As research continues into the potential therapeutic applications of nitrous oxide, it remains clear that mental health conditions require comprehensive and carefully considered treatment strategies.