The two-hour monitoring window:
what it actually requires.

When the clock starts

The observation period runs from administration — and since a session is one, two, or three nasal-spray devices (56 mg is two devices, 84 mg is three) separated by a five-minute rest each, the practical convention is to anchor the window at the first device. A clinic that times from the last device runs a longer day; a clinic that loses track of when the first device was given can't prove the window ran at all. Whatever your convention, it should be written down, consistent, and visible to the people running the floor.

The vitals cadence

• Before the dose. Blood pressure is taken pre-dose — esketamine is contraindicated against uncontrolled hypertension, and an elevated baseline reading is a prescriber decision, not a nursing one. This is also where the session checklist lives: identity, enrollment current, transport home arranged, medication changes since last visit.
• Around forty minutes. Blood pressure peaks roughly 40 minutes post-dose, so the label calls for a re-check there. Many clinics treat this as a quick all-clear when the patient looks fine, with a full set of readings when anything warrants it.
• Before discharge. A final assessment — vitals plus a clinical judgment that sedation and dissociation have resolved enough for the patient to leave safely.
• As clinically warranted in between. The cadence above is a floor, not a ceiling — anything observed during the window can call for another reading.

What staff are watching for

The window exists because the predictable effects — sedation, dissociation, and blood-pressure elevation — concentrate in those first two hours. Observations get documented as they happen, with times: when a reviewer reads the record later, the difference between “dissociation, mild, 14:22, resolved 14:50” and a vague end-of-day note is the difference between a defensible record and an anecdote. Anything serious belongs in the session's adverse-event review before discharge — including the explicit confirmation that nothing rose to that level, which is itself a finding worth recording.

What has to be true at discharge

• At least two hours have elapsed since administration.
• The patient is clinically stable — sedation and dissociation assessed and resolved to the clinician's satisfaction, with a final set of vitals taken.
• Any observations have been through the serious-adverse-event review — marked serious or explicitly not.
• The patient is leaving with their arranged transport — no driving or operating machinery until the next day, after a restful sleep.

A session that has to end early — a patient who insists on leaving, a clinical decision to stop — isn't a record to quietly discard. It's a session like any other, documented with its reason; an early end with an honest record is defensible in a way a gap in the log never is.

Running several windows at once

The hard part operationally isn't one window — it's four, staggered across an afternoon, each at a different phase with a different next-thing-due. That's a scheduling problem wearing a compliance costume: whoever can see all the clocks at once runs a calm floor, and whoever can't is doing arithmetic at the front desk while a forty-minute check goes quietly overdue. However a clinic solves it — a whiteboard, a spreadsheet, or a live board — the test is the same: can anyone, at a glance, say what's due next in every room?

Related guides

• Spravato® REMS requirements, explained
• The seven-day filing deadline, and how clinics miss it