Can a reversal drug protect memory during ECT for depression?
NCT ID NCT07619092
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether giving flumazenil, a drug that reverses the effects of benzodiazepines, right before electroconvulsive therapy (ECT) can reduce cognitive side effects like memory loss in hospitalized patients with depression. About 145 participants will either continue their benzodiazepine and receive flumazenil before ECT, or stop the benzodiazepine beforehand as usual. The goal is to see if flumazenil helps protect thinking and memory without reducing ECT's effectiveness.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Flumazenil
- What this could lead to
- If it works, this could offer a way to reduce memory and thinking side effects of ECT for depression, making the treatment easier to tolerate.
- What could go wrong
- This is a small, early-stage trial. The benefit may be small or not appear, and flumazenil could cause anxiety or other side effects. Results may not apply to all patients.
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
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 145 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Aug 2028
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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: * 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)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Mental Health Centre Copenhagen, Bispebjerg and Frederiksberg Hospital
RECRUITINGFrederiksberg, Capital Region, 2000, Denmark
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