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Is Ketamine Therapy Legal in Missouri?

Yes. Ketamine is a federal Schedule III controlled substance, and physicians licensed in Missouri may prescribe and administer it — including off-label for depression, which means for a purpose the FDA has not formally approved.

The federal baseline

Ketamine and its mirror-image form esketamine are Schedule III controlled substances under federal law, which means they have accepted medical uses but can be misused. as of 18 Jul 2026 · U.S. Drug Enforcement Administration (source 1, opens in a new tab)Esketamine has no separate DEA listing; it is covered as an enantiomer of ketamine, and the Spravato label carries the CIII designation.

Only esketamine (Spravato) is FDA-approved to treat depression. Racemic ketamine given by IV, injection, or under the tongue has no FDA approval for any psychiatric condition and is used off-label — that is, an approved drug used for an unapproved purpose. as of 30 Apr 2025 · U.S. Food and Drug Administration (source 1, opens in a new tab)

The FDA approved Spravato (esketamine) nasal spray on 5 March 2019, for use with an oral antidepressant, for adults with treatment-resistant depression. as of 5 Mar 2019 · U.S. Food and Drug Administration (source 3, opens in a new tab)

Spravato is available only through a restricted safety programme called a Risk Evaluation and Mitigation Strategy (REMS), and may only be given in a certified healthcare setting under a provider's direct observation. Patients never take it home. as of 30 Apr 2025 · U.S. Food and Drug Administration (source 4, opens in a new tab)

Missouri law: who may give it

Missouri physicians may prescribe and administer ketamine without restriction. An advanced practice registered nurse may be delegated authority to prescribe it under a written collaborative practice arrangement with a physician, but that arrangement cannot delegate authority to give a Schedule III to V medicine for the purpose of sedation or anaesthesia. A physician assistant with controlled-substance certification may be delegated similar prescribing authority. as of 28 Aug 2023 · Missouri Revisor of Statutes (source 3, opens in a new tab)Whether the sedation restriction reaches low-dose ketamine infusions for depression — as opposed to anaesthesia — is genuinely unsettled in Missouri. No board guidance, attorney general opinion or court decision resolves it, so we do not state an answer either way. It is a fair question to ask a clinic about who will be in the room.

Missouri Prescription Drug Monitoring Program (Missouri PDMP)

Prescription monitoring is where published information about ketamine most often goes wrong, because three different questions get collapsed into one. They have different answers.

What must be reported

Missouri's statewide monitoring programme was created in 2021 and went live on 13 December 2023. Pharmacies and dispensing practitioners must report every Schedule II, III and IV controlled substance they dispense, in real time since 1 January 2024. Schedule V is not reportable in Missouri. as of 1 Jan 2024 · Missouri Revisor of Statutes (source 3, opens in a new tab)

When a prescriber must check

Missouri law does not require a prescriber to check the monitoring programme before writing a prescription — the programme's own guidance says so directly. The one exception comes from federal law: a prescriber must check before prescribing a Schedule II to IV controlled substance to a MO HealthNet patient. as of 13 Dec 2023 · Missouri Prescription Drug Monitoring Program (source 3, opens in a new tab)

Does this apply to ketamine?

Partly. Ketamine is Schedule III, so if a pharmacy dispenses take-home sublingual ketamine to you it is reported. Ketamine and Spravato given inside a clinic are generally not reported, because Missouri specifically exempts a practitioner who administers a medicine from the reporting duty. And because Missouri does not mandate prescriber checks, the one situation where a prescriber must look you up before prescribing ketamine is if you are a MO HealthNet patient. as of 1 Nov 2023 · Missouri Prescription Drug Monitoring Program (source 3, opens in a new tab)

Telehealth

Missouri does not specifically require an in-person examination before prescribing a controlled substance, but a physician must first establish a proper relationship with you, including a medical history and an examination good enough to establish the diagnosis. A prescription cannot rest on a phone call alone without an existing relationship, or on an online questionnaire. as of 28 Aug 2025 · Missouri Revisor of Statutes (source 7, opens in a new tab)Federal DEA telemedicine flexibilities run separately and expire at the end of 2026.

Through 31 December 2026, clinicians registered with the DEA may prescribe controlled medicines such as ketamine after a video telemedicine visit, without an in-person examination first. as of 1 Jan 2026 · Drug Enforcement Administration (source 1, opens in a new tab)This is the fourth temporary extension. Each of the previous three was issued close to its expiry date, so the position may change late in 2026.

The DEA's proposed rule to create a special registration for prescribing controlled medicines by telemedicine, published on 17 January 2025, is still only a proposal and has not been finalised. as of 17 Jan 2025 · Drug Enforcement Administration (source 1, opens in a new tab)No final rule and no withdrawal notice has been published. A rule can also be shelved without a formal withdrawal, so this should not be read as a statement that the DEA intends to finalise it.

Two things are worth holding onto here. The federal flexibility has a hard end date and has been extended four times at short notice, so anything you read about telehealth ketamine access needs a date attached to it. And a stricter state rule still applies regardless of what federal law permits.

Spravato is a separate case entirely: it must be taken in a certified clinic under observation, so it cannot be prescribed for home use whatever the telehealth position is.

How to check a clinician before you book

  1. Go to the Missouri Board of Registration for the Healing Arts licence lookup.
  2. Search by name, and confirm the licence is current and unrestricted.
  3. Look for disciplinary history. It is published for a reason, and it is the single most useful thing you can check in five minutes.
  4. If you are seeking Spravato specifically, confirm the clinic is REMS-certified using the official locator . No other directory, including ours, can tell you that.