Is Ketamine FDA Approved? Depression, PTSD, and What Off-Label Means

Short answer: Ketamine itself is FDA approved as an anesthetic, a status it has held since 1970. Its use for depression is off-label, which is legal and common in medicine. The related medication esketamine, sold as Spravato, is specifically FDA approved for treatment-resistant depression and for depression with suicidal thoughts or behavior. Neither is FDA approved for PTSD, where use remains off-label. Here is the full map.

The approval status, medication by medication

It helps to separate the players. Generic ketamine has been FDA approved since 1970 as an anesthetic and remains a staple of hospitals and operating rooms worldwide. Esketamine, a molecule derived from part of ketamine, was approved by the FDA in 2019 under the brand name Spravato for treatment-resistant depression, and in 2020 for depressive symptoms in adults with major depression and acute suicidal thinking or behavior. Those are the on-label facts. Everything else ketamine is known for in mental health happens through off-label prescribing.

What off-label actually means

Off-label sounds irregular, but it is one of the most ordinary things in medicine: a physician prescribing an FDA-approved medication for a condition other than the one on its original label, based on clinical evidence and judgment. Roughly one in five prescriptions written in the United States is off-label. IV ketamine for depression fits this exactly, an approved medication, supported by more than two decades of clinical research, prescribed for a different indication than anesthesia. Off-label does not mean unproven or illegal; it means the formal FDA indication has not been pursued, in part because generic drugs lack the patent incentives that fund massive approval trials. We cover the legal side fully in is ketamine therapy legal.

What about PTSD?

Neither ketamine nor Spravato is FDA approved for post-traumatic stress disorder. Clinics that treat PTSD with ketamine, including for the first responders and veterans we wrote about in our law enforcement PTSD post, do so off-label, supported by a growing but younger research base showing reduced symptom severity in many patients. This distinction matters practically for insurance: TRICARE, for example, covers Spravato for depression diagnoses but not for PTSD alone, as we detail in our TRICARE coverage guide.

Why the distinction matters to you

Three practical takeaways. First, insurance follows the label: Spravato's approvals give it a real coverage pathway, while off-label IV ketamine is usually self-pay. Second, approval status does not equal effectiveness ranking: many clinicians consider IV ketamine the more precise, adjustable option even though Spravato holds the depression approval, a trade-off we walk through in ketamine versus Spravato. Third, either way, treatment should happen under qualified medical supervision, which is where safety actually lives.

The evidence keeps moving

Research on ketamine for depression, PTSD, OCD, and pain continues to accumulate, and approval landscapes can change, as esketamine's own approvals showed. What is true today, anesthetic approval for ketamine, depression approvals for Spravato, off-label everything else, is the current state of a moving field.

This article is for educational purposes only and is not medical advice. Approval and coverage details can change; verify current status with a qualified provider or insurer.

The bottom line

Ketamine is FDA approved as an anesthetic, and its use for depression is off-label, legal, and evidence-supported. Spravato is FDA approved for treatment-resistant depression and depression with acute suicidal thinking. Nothing in the ketamine family is FDA approved for PTSD yet, where use is off-label. If you want help sorting out what this means for your treatment options, call us at (310) 280-4440.

Frequently asked questions

Is ketamine FDA approved for depression? Not directly. Ketamine is FDA approved as an anesthetic, and its use for depression is off-label. The related medication esketamine (Spravato) is FDA approved for treatment-resistant depression.

Is ketamine FDA approved for PTSD? No. Neither ketamine nor Spravato is FDA approved for PTSD. Ketamine is used off-label for PTSD, supported by a growing research base.

Does off-label mean unsafe or illegal? No. Off-label prescribing is legal and common, making up roughly one in five US prescriptions. It means the medication is FDA approved for a different indication, not that it is unproven.

Why has IV ketamine never been FDA approved for depression? Largely economics. Ketamine is a decades-old generic, so no company has the patent incentive to fund the large trials an FDA indication requires. The clinical evidence base has grown anyway.