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Brain drug levels measured in healthy volunteers

NCT ID NCT02362516

Knowledge-focused Sponsor: Boehringer Ingelheim 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This early-phase study tested the drug Iclepertin (BI 425809) in 25 healthy men to see how much of it reaches the brain and how it affects certain brain chemicals. Participants took multiple doses of the tablet, and researchers measured drug levels in blood and spinal fluid. The main goals were to understand the drug's safety and how it behaves in the body, not to treat any disease.

What this could mean

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

Active substance
BI 425809 (Iclepertin) tablet
What this could lead to
If successful, this could help determine the right dose for future studies of Iclepertin in conditions like Alzheimer's or schizophrenia.
What could go wrong
This is a very early Phase 1 study in only 25 healthy men, so it cannot prove the drug works for any disease. Side effects are possible but not yet well understood.

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 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

25 people

The number who actually took part.

Started

Feb 2015

Finished

Jun 2015

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

18 to 55 years

Sex

Male participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Healthy male according to the investigator's assessment, based on a complete medical history including a physical examination, vital signs (blood pressure (BP), puls rate (PR)), 12-lead electrocardiogram (ECG), and clinical laboratory tests * Age of 18 to 55 years (incl.) * Body Mass Index (BMI) of 18.5 to 29.9 kg/m2 (incl.) * Signed and dated written informed consent prior to admission to the study in accordance with good clinical practice (GCP) and local legislation Exclusion criteria: * Any finding in the medical examination (including blood pressure (BP), puls rate (PR) or electrocardiogram (ECG)) is deviating from normal and judged as clinically relevant by the investigator * Repeated measurement of systolic blood pressure outside the range and considered as clinical relevant by investigator * Any laboratory value outside the reference range that the investigator considers to be of clinical relevance * Any evidence of a concomitant disease judged as clinically relevant by the investigator * Gastrointestinal, hepatic, renal, respiratory, cardiovascular, metabolic, immunological or hormonal disorders * Surgery of the gastrointestinal tract that could interfere with kinetics of the trial medication * Diseases of the central nervous system (including but not limited to any kind of seizures or stroke), and other relevant neurological or psychiatric disorders Further exclusion criteria may apply

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As listed by the trial registrant

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

Healthy

Contacts and locations

Locations

  • 1346.3.32001 Boehringer Ingelheim Investigational Site

    Antwerp, Belgium

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