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Ketamine sedation may trigger hidden brain activity, study finds

NCT ID NCT06741930

Knowledge-focused Sponsor: Haseki Training and Research Hospital Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This completed study looked at whether the sedative ketamine can cause seizure-like brain activity in people without epilepsy. Researchers monitored 300 adults undergoing a routine stomach scope procedure using EEG brain scans. They compared ketamine to two other common sedatives, midazolam and propofol, to see which was safest.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 4

Runs after approval, following long-term safety and how well the treatment works in everyday use.

Participants

300 people

The number who actually took part.

Started

Dec 2024

Finished

Aug 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: \- Adults aged ≥18 years scheduled to undergo procedural sedation prior to esophagogastroduodenoscopy in the endoscopy unit were included in the study. Exclusion Criteria: * patients aged \<18 years, * pregnant or breastfeeding females, * patients with a known history of epilepsy, previous status epilepticus, or neurological conditions such as head trauma, brain tumors, cerebrovascular events, meningitis, or encephalitis, as well as congenital or acquired structural brain anomalies. * Individuals with a first-degree family history of epilepsy or who had used medications affecting the central nervous system (e.g., antidepressants, antipsychotics, sedatives, benzodiazepines, or opioids) within the previous month were also excluded. * Patients were also excluded if they had a known allergy or hypersensitivity to the study drugs (IV ketamine, IV midazolam, IV propofol) or to adjunctive medications used for procedural sedation (e.g., IV fentanyl). * Patients with a history of complications during anesthesia or previous surgical procedures, such as malignant hyperthermia or respiratory failure. * Patients with significant movement disorders, agitation, scalp lesions, or other conditions interfering with EEG recording. * Patients with severe cardiovascular disease, including uncontrolled hypertension, advanced heart failure, or arrhythmias, as well as those with oxygen saturation \<90%, a high risk of respiratory depression, or severe obstructive sleep apnea syndrome. * Patients with severe hepatic or renal failure, or those who had undergone major surgery within the previous 6 months.

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Conditions

The condition(s) this trial relates to.

epilepsy visual epilepsy

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Epilepsy Seizure

Contacts and locations

Locations

  • Haseki Training and Research Hospital

    Istanbul, Istanbul, 34265, Turkey (Türkiye)

More trials for these conditions

Other studies related to the condition(s) this trial covers.