Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Flumazenil to help reduce cognitive side effects during ECT for depression

Official title: Flumazenil for Benzodiazepine Reversal in Electroconvulsive Therapy (FLEET): A Randomized Controlled Trial

Run by Mental Health Centre Copenhagen, Bispebjerg and Frederiksberg Hospital · NCT07619092 · Data updated 2026-11-12

This study tests whether giving flumazenil to reverse benzodiazepine effects during electroconvulsive therapy can lower cognitive side effects without reducing treatment effectiveness in adults with depression.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment145 (estimated)
SponsorMental Health Centre Copenhagen, Bispebjerg and Frederiksberg Hospital
Academic / other
Locations1 site (Frederiksberg, Capital Region)
StatusRecruiting
StartedJanuary 15, 2026
Main results expectedAugust 2028
Study endsAugust 2028
Registry record updatedJune 1, 2026
Trial IDNCT07619092 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (≥18) with a mood disorder in a depressive episode, admitted for ECT, currently on benzodiazepine or zopiclone therapy at or above 0.5 mg lorazepam equivalent.

Probably not a fit

Patients not on benzodiazepines or zopiclone, or those for whom flumazenil is contraindicated, may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

In adults with major depressive disorder or bipolar depression, participants receiving electroconvulsive therapy will be randomized to receive flumazenil to reverse benzodiazepine effects or a control during the ECT course. The primary outcome is the total SCIP score after the ECT series to measure cognitive function. Secondary outcomes include changes in pre-treatment anxiety, patient satisfaction, subjective memory complaints, autobiographical memory, and executive function. Randomization is stratified by age and electrode placement, with blinded outcome assessment for the primary endpoint. The study plans to enroll 145 participants to account for dropout, across two hospital sites in Denmark.

Why it matters

Potential benefit: If successful, flumazenil could reduce cognitive side effects of ECT and improve patient experience without compromising seizure efficacy.

How similar studies have gone: Prior research suggests that benzodiazepine reversal during ECT is a plausible approach, but this specific strategy is exploratory.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion criteria:

* Current depressive episode (unipolar or bipolar), corresponding to ICD-10 codes F31.3-5, F32 or F33.
* Admitted at a study affiliated department in the Mental Health Services of the Capital Region of Denmark
* Referred to ECT by the regular psychiatrist and has given consent to ECT
* Currently receiving treatment with a benzodiazepine and/or zopiclone, at a minimum daily dose equivalent to 0.5 mg lorazepam.

Exclusion criteria:

* Involuntary treatment with ECT
* Known gross abnormalities in brain structure deemed likely to influence cognitive functioning
* Pregnancy or breast-feeding
* Inability to read or understand Danish
* Acute organic brain disease (e.g., delirium) influencing the ability to give informed consent
* Any pre-existing condition associated with an increased risk of prolonged or uncontrollable seizures, including but not limited to epilepsy or alcohol- or benzodiazepine withdrawal states
* Conditions associated with reduced metabolism of flumazenil (e.g., liver failure)

Where it's running

  • Mental Health Centre Copenhagen, Bispebjerg and Frederiksberg Hospital
    Frederiksberg, Capital Region, Denmark
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.