Spravato (esketamine) nasal spray is a modern, clinic-administered treatment used for individuals with treatment-resistant depression or major depressive disorder with severe symptoms. It is not a traditional antidepressant, and it works through a different pathway in the brain compared to medications that target serotonin. Because of this unique mechanism, it can offer rapid improvement in mood symptoms for some patients under medical supervision.
Understanding how Spravato works helps clarify why it is used in structured clinical settings and how it fits into a broader psychiatric treatment plan.
A Different Pathway in the Brain
Most standard antidepressants focus on serotonin, dopamine, or norepinephrine. Spravato works differently by targeting a brain chemical system involving glutamate, which plays a major role in communication between nerve cells.
Specifically, esketamine affects NMDA receptors in the brain. These receptors help regulate how nerve cells send signals related to mood, stress response, and emotional processing. By influencing this system, Spravato helps reset patterns of brain activity that may be disrupted in depression.
How the NMDA Receptor Mechanism Works
Spravato acts as an NMDA receptor antagonist, meaning it temporarily blocks this receptor’s activity. This leads to changes in how glutamate is released and processed in the brain.
When NMDA activity is reduced, it allows for increased communication through other pathways involved in mood regulation and neural connectivity. This process is believed to support improved brain flexibility, often referred to as neuroplasticity, which can be important in recovery from depressive symptoms.
In simpler terms, it helps the brain form healthier communication patterns that may have been reduced during prolonged depression.
Why It Works Faster Than Traditional Antidepressants
One of the most notable features of Spravato is its rapid onset of action. While traditional antidepressants may take weeks to show improvement, some patients report changes in mood within hours to days after treatment sessions.
This faster response is linked to its direct effect on glutamate signaling rather than gradual changes in serotonin levels. The shift in brain activity can create early improvements in emotional relief, motivation, and thought patterns.
How Treatment Is Administered in Clinical Settings
Spravato is not taken at home. It is administered as a nasal spray in a certified medical setting under supervision. This is important because the medication can cause temporary dissociative effects, sedation, or changes in blood pressure.
During a typical session, patients self-administer the nasal spray while being monitored by clinical staff for safety and response. Observation continues after administration to ensure the patient is stable before leaving the clinic.
At Allied Psychiatry and Mental Health, treatment is provided within a structured environment designed to ensure both safety and therapeutic support throughout the process.
What Patients May Experience During Treatment
Because Spravato nasal ketamine directly affects brain signaling, its effects can be noticeable during and shortly after administration. Patients may experience a sense of detachment, relaxation, or changes in perception. These effects are temporary and typically resolve within a few hours.
The therapeutic benefit is not only tied to symptom relief but also to how the brain responds after the medication’s acute effects wear off. Many patients report gradual improvement in mood stability over repeated sessions when used as part of a supervised treatment plan.
Role in Depression Treatment Plans
Spravato is not used as a standalone long-term solution for everyone. It is typically part of a broader treatment strategy that may include oral antidepressants and ongoing psychiatric care.
At Allied Psychiatry and Mental Health, Dr. Hadi Estakhri, MD evaluates each patient carefully to determine whether Spravato is appropriate based on symptom severity, treatment history, and overall mental health needs.
This individualized approach ensures that treatment is not only effective but also medically appropriate for each patient.
Why This Mechanism Matters
The importance of Spravato lies in its ability to offer an alternative pathway for patients who have not responded well to traditional treatments. By targeting glutamate signaling instead of serotonin alone, it introduces a different biological approach to managing depression.
This has expanded treatment options for individuals with persistent symptoms and has provided new possibilities for patients who previously had limited response to medication.
Conclusion
Spravato nasal ketamine works by targeting NMDA receptors in the brain, influencing glutamate activity and supporting changes in neural communication linked to mood regulation. This mechanism allows for rapid symptom improvement in some patients, especially those with treatment-resistant depression.
With careful administration and supervision at Allied Psychiatry and Mental Health under Dr. Hadi Estakhri, MD, Spravato can be a valuable part of a structured treatment plan aimed at improving depressive symptoms and overall mental well-being.
About the Author
Hadi Estakhri, MD - Founder
May 12, 2026
