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New therapy for insomnia: stop fighting sleep and start living

NCT ID NCT06336551

Symptom relief Sponsor: University of Amsterdam Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether a type of talk therapy called Acceptance and Commitment Therapy (ACT) can improve sleep in adults with insomnia. 93 participants were randomly assigned to either receive ACT for 7 weeks or join a waitlist. The therapy encourages people to stop struggling with sleep and instead focus on meaningful daytime activities. Researchers measured sleep severity, mood, and quality of life to see if ACT works on its own.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Acceptance and Commitment Therapy for insomnia (ACT-I)
What this could lead to
If it works, this could offer a new, drug-free way to manage insomnia by focusing on daytime activities rather than controlling sleep.
What could go wrong
This is a small, early-stage trial with only 93 participants, and the waitlist design may overestimate benefits. Results may not apply to everyone with insomnia.

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

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

93 people

The number who actually took part.

Started

Apr 2024

Finished

Jan 2026

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: * insomnia severity index score ≥ 15 * clinical insomnia disorder diagnosis, as confirmed by the SCID-S-5 insomnia interview * age of 18 years or above * proficiency in Dutch * ability to come on-site for the treatment sessions Exclusion Criteria: * previously received ACT * started psychotherapy within the last 6 months or currently awaiting psychotherapy * changed psychoactive medication in the last 3 months * diagnosis of psychosis or schizophrenia * severe depressive complaints (BDI-II score ≥ 29) or active suicidal ideation

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Conditions

The condition(s) this trial relates to.

insomnia

As listed by the trial registrant

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

Insomnia

Contacts and locations

Locations

  • University of Amsterdam

    Amsterdam, North Holland, 1018 WS, Netherlands

More trials for these conditions

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