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Study to evaluate the effects of brexanolone and lorazepam on the nervous system in healthy male participants using magnetic brain stimulation

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What is this trial about?

A plain-language summary of the goals, design and what participants do

This study aims to evaluate the effects of brexanolone on the central nervous system, which is the complex network of nerves in the brain and spinal cord. The research compares how this substance affects brain activity compared to lorazepam and a placebo. The investigation uses transcranial magnetic stimulation, a method that uses magnetic fields to stimulate nerve cells in the brain, to observe changes in how the nervous system functions.

Participants will take part in a study involving four different periods where they will receive different treatments in a specific order. During these periods, the administration of brexanolone is given through intravenous means, which means the medicine is delivered directly into a vein. The lorazepam is taken as an oral tablet. By using a crossover design, each person receives each treatment at different times to allow for a direct comparison of the effects.

The research process

The trial runs in 3 steps – from screening to follow-up. Each step says what happens and what the team monitors.

  1. Step 1

    Participation in the study

    The study is a 4-period crossover study, which means the medications will be administered in different sequences over four distinct stages.

    During each stage, transcranial magnetic stimulation (a procedure that uses magnetic fields to stimulate nerve cells in the brain) will be used to measure the effects of the substances on the central nervous system (the brain and spinal cord).

  2. Step 2

    Administration of substances

    One stage involves receiving brexanolone via intravenous administration (delivered through a vein) at a dose of 90 µg/kg (micrograms per kilogram of body weight).

    Another stage involves receiving a brexanolone placebo, which is an inactive substance that looks like the medication but has no active ingredients.

    A third stage involves taking lorazepam, which is an oral tablet, at a dose of 2 mg.

    The final stage involves taking a lorazepam placebo, which is an inactive tablet.

  3. Step 3

    Measurements and evaluations

    Measurements are taken to observe changes in motor evoked potentials (electrical signals in the muscles produced by stimulating the brain) using transcranial magnetic stimulation and electromyography (a method to record the electrical activity of muscles).

    The evaluations focus on the amplitude (the strength or size of the signal) and the cortical inhibition or facilitation (how the brain's activity is slowed down or increased) in response to the administered substances.

Who can join the trial?

7 criteria

  • You must be a healthy adult male who is able to walk on your own, which is known as being ambulatory.
  • A doctor must find no significant health issues during your physical exam, which includes checking your neurologic status (how your brain and nerves work) and your mental status (your ability to think and respond clearly).
  • You must have a normal 12-lead electrocardiogram (ECG), which is a test that records the electrical activity of your heart.
  • Your laboratory tests, such as blood or urine tests, must show no significant health concerns.
  • You must be between 18 and 65 years old at the time you agree to join the study.
  • Your body weight must be at least 50 kg (about 110 pounds).
  • Your body mass index (BMI), which is a calculation used to check if your weight is healthy for your height, must be between 18.0 and 33.0.

Who cannot join the trial?

6 criteria

  • You have a history or current condition involving psychiatric disorders (mental health conditions) or neurologic diseases (conditions affecting the brain or nervous system), such as epilepsy (a disorder causing seizures), eating disorders, or seizures.
  • You have experienced a closed head trauma, which means a head injury where the skull was not broken, that resulted in lasting health problems or sequelae (the long-term effects or consequences of a medical condition).
  • You have a history of an intracranial mass lesion (a growth or tumor inside the skull), hydrocephalus (a buildup of fluid in the brain), or any serious head injury that could make using TMS (a medical technique that uses magnetic fields to stimulate the brain) unsafe.
  • You have any metal objects located inside your brain or skull.
  • You have a cochlear implant (a device used to help with hearing) or a deep brain stimulation device (an implanted device used to treat certain brain disorders).
  • You are currently taking any psychotropic medications, which are drugs used to affect the mind, including antidepressants (medicine used to treat depression) or anxiolytics (medicine used to reduce anxiety).
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Investigated drugs

  • Brexanolone

    is a medication given through an IV (intravenous) line to study its effects on the central nervous system.

  • Lorazepam

    is a medication taken by mouth used in this study to compare its effects on the central nervous system against the other treatments.

What is already known about the treatment

  • Lorazepam

    This medication is taken as a pill that is swallowed by mouth. It is a well-established drug used to treat conditions like anxiety and sleep problems. It works by increasing the activity of a natural chemical in the brain that helps calm the nervous system, making it a type of sedative.

  • Brexanolone

    This substance is administered through an intravenous drip, meaning it is delivered directly into a vein. It is currently being studied for its effects on the brain and is primarily used to treat certain types of severe depression. At a molecular level, it mimics a natural hormone in the brain to help balance nerve cell activity, classifying it as a neuroactive compound.

Investigated diseases

The provided source data indicates that the study is being conducted in healthy volunteers and does not list a specific disease or medical condition. Therefore, no disease descriptions can be provided.
Trial detailsLast updated 7 Oct 2026
Age18+ yearsPhasePhase ITrial ID2022-503019-40-00Protocol code547-TRM-101Estimated enrolment24 patientsSponsorSage Therapeutics Inc.

sourced from the EU Clinical Trials Register and site verification

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