A First-in-human Trial of GRT7041 in Healthy Participants

February 18, 2026 updated by: Grünenthal GmbH

A Randomized, Single-center, Double-blind, Placebo-controlled, First-in-human Trial With Single and Multiple Ascending Doses to Determine Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of GRT7041 in Healthy Participants.

The purpose of this trial is to assess the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of GRT7041 in healthy male and female (Women of non-childbearing potential) participants.

The trial duration will be up to approximately 6 weeks for participants in Part 1 (Single ascending dose [SAD]), except for participants taking part in the food effect cohort SAD3 where the trial duration will be up to approximately 8 weeks. The trial duration will be up to approximately 7 weeks in Part 2 (Multiple ascending dose [MAD]), and the Treatment Period will be up to 14 days (for Part 2).

The trial will include a Screening Visit, an in-house stay period and Follow-up (FU) Visit/End-of-Trial (EoT) Visit.

Study Overview

Detailed Description

The trial will consist of two parts:

  • Part 1: SAD with up to five cohorts SAD1 to SAD5 (n = 40). To be conducted in adult males and women of non-childbearing potential (WONCBP).
  • Part 2: MAD with up to three cohorts, MAD1 to MAD3 (n = 30) dosed once daily (QD) for a period of 14 days. To be conducted in adult males only.

The trial design also evaluate the potential interaction of GRT7041 with a CYP3A4 index substrate that will be assessed separately in all cohorts in Part 2 (MAD) of the trial.

Dosing in Parts 1 and 2 will be conducted under fasted conditions, except for the SAD3 cohort in Part 1 (SAD), where participants will also receive a standardized breakfast (SAD3b treatment) to assess the effect of food.

Study Type

Interventional

Enrollment (Estimated)

70

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

      • Christchurch, New Zealand, 8011
        • Recruiting
        • New Zealand Clinical Research (NZCR)
        • Contact:
        • Principal Investigator:
          • Cory Sellwood, MD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Main Inclusion Criteria:

  1. The participant must be able to give signed informed consent, including compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
  2. Participants must sign the ICF before any trial-related assessments.
  3. The participant is in good health as judged by the Investigator including medical history, physical examination, 12-lead ECG, vital signs (pulse rate, respiratory rate, systolic and diastolic BP), body temperature, and clinical laboratory parameters (clinical chemistry, hematology, coagulation and urinalysis) without clinically relevant deviations from reference ranges, unless further specified in the exclusion criteria.

Main Exclusion Criteria:

  1. History of any of the following: cardiac impairment, renal impairment, pancreatitis, coagulation abnormalities.
  2. Any other disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding that contraindicates the use of an investigational drug, may affect the interpretation of the results, or may render the patient at high risk for treatment complications/ participation in the trial unsafe.
  3. Any disease or conditions known to interfere with the absorption, distribution, metabolism, or excretion of the IMP.
  4. Evidence or medical history of clinically significant and relevant psychiatric issues as assessed by the Investigator.
  5. Confirmed or suspected history of clinically relevant drug allergy.
  6. Major surgical procedure, within 30 days prior to ICF signing, or anticipation of need for a major surgical procedure during the trial.
  7. Blood loss of 500 mL or more (eg, owing to blood donation) within 90 days before Screening Visit.
  8. The participant has used any medication, including herbal remedies or over-the-counter medication within 2 weeks (or 5 half-lives, whichever is longer) before the start of the trial intervention or anticipated use during the trial, unless, in the opinion of the Investigator and Sponsor, the medication will not interfere with the trial.
  9. The participant is enrolled in another clinical trial unless it is an observational (non-interventional) clinical trial or during the follow-up period of an interventional trial) or has received an IMP in another clinical trial within 30 days before Day 1 or within 5 times the elimination half-life of the IMP, whichever is longer.
  10. Reluctance to comply with contraception requirements.
  11. Evidence or history of alcohol or drug abuse including positive or missing alcohol breath test or drugs of abuse test(s).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Part 1: SAD
With up to five cohorts SAD1 to SAD5 (n = 40). To be conducted in adult males and WONCBP
Single ascending doses
Placebo to match GRT7041 dose strength
Experimental: Part 2: MAD
With up to three cohorts, MAD1 to MAD3 (n = 30) dosed once daily (QD) for a period of 14 days. To be conducted in adult males only.
Placebo to match GRT7041 dose strength
Solution
Multiple ascending doses

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of participants with Adverse Events
Time Frame: Through study completion, an average of 8 Weeks

An AE is defined as any unfavorable medical occurrence in a trial participant administered the investigational product.

Assessment of the safety and tolerability of GRT7041 after oral single and multiple-dose escalation

Through study completion, an average of 8 Weeks
Number of participants with Serious Adverse Events
Time Frame: Through study completion, an average of 8 Weeks

A Serious Adverse Event (SAE) is any untoward medical occurrence that, at any dose:

  • Results in death, is life-threatening, or requires (or prolongs) hospitalization;
  • Results in persistent or significant disability/incapacity;
  • Is a congenital anomaly or birth defect; or
  • Is considered medically significant, requiring intervention to prevent one of the outcomes above.
  • Investigator judgment applies to other clinically important events that may not be immediately life-threatening but could jeopardize participant safety.

Assessment of the safety and tolerability of GRT7041 after oral single and multiple-dose escalation

Through study completion, an average of 8 Weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Area Under the Concentration-Time Curve from 0 to 24 hours [(AUC)0-24] [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The total amount of the study drug (and metabolite) in the blood during the first 24 hours after it is taken.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Area Under the Plasma Concentration-Time Curve from Time 0 to the last measurable concentration (t) [AUC0-t] [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The total amount of the study drug (and metabolite) in the blood from the time it is taken until the last time a measurable level of the drug is found.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Area Under the Plasma Concentration-Time Curve from Time 0 extrapolated to infinity (AUC0-inf ) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The total amount of the study drug (and metabolite) in the blood from the time it is taken until it has completely left the body.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Maximum Observed Plasma Concentration (Cmax) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The maximum amount of the study drug (and metabolite) measured in the blood after taking the dose.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Time to Reach Maximum Observed Plasma Concentration (Tmax) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The time it takes to reach the highest concentration of the study drug (and metabolite) in the blood after dosing.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Terminal Elimination Half-Life (t₁/₂) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The time it takes for the amount of study drug (and metabolite) in the blood to reduce by half after reaching its peak level.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Terminal Elimination Rate Constant (λz) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The rate at which the study drug (and metabolite) is eliminated from the blood during the final phase after dosing.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Apparent Total Clearance of Drug From Plasma After Extravascular Administration (CL/F) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The amount of blood completely cleared of thestudy drug (and metabolite) per unit of time, taking into account how much of the drug is absorbed into the body.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Apparent Volume of Distribution During the Terminal Phase After Extravascular Administration (Vz/F) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

An estimate of how widely the study drug spreads through the body's tissues after it is absorbed.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Lag Time Before First Measurable Concentration (tlag) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The time between when the study drug (and metabolite) is taken and when it first becomes measurable in the blood.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Time of Last Measurable Concentration (tlast) [SAD]
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)

The last time point when a measurable amount of the study drug (and metabolite) is found in the blood.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Amount of Study Drug Excreted in Urine (Ae) [SAD]
Time Frame: Day 1 to Day 4 (from 0 hours to 72 hours)

The total amount of the study drug (and metabolite) that is passed out of the body through urine during a specific collection period.

Collected only for one cohort in Part 1: SAD.

Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (from 0 hours to 72 hours)
Cumulative Amount of Study Drug Excreted in Urine (Cumulative Ae) [SAD]
Time Frame: Day 1 to Day 4 (from 0 hours to 72 hours)

The total amount of the study drug (and metabolite) eliminated in urine from the time of dosing up to the end of each collection period, showing how much of the drug has been removed from the body over time.

Collected only for one cohort in Part 1: SAD. Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (from 0 hours to 72 hours)
Percentage of Dose Excreted in Urine (Ae%) [SAD].
Time Frame: Day 1 to Day 4 (from 0 hours to 72 hours)

The percentage of the total amount of the study drug (and metabolite) dose that is passed out in urine during each collection period.

Collected only for one cohort in Part 1: SAD. Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (from 0 hours to 72 hours)
Cumulative Percentage of Dose Excreted in Urine (Cumulative Ae%) [SAD]
Time Frame: Day 1 to Day 4 (from 0 hours to 72 hours)

The total percentage of the study drug dose excreted in urine from dosing until the end of each collection period, showing how much of the drug has been eliminated over time.

Collected only for one cohort in Part 1: SAD. Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (from 0 hours to 72 hours)
Renal Clearance of Study Drug (CLr) [SAD]
Time Frame: Day 1 to Day 4 (from 0 hours to 72 hours)

The rate at which the study drug (and metabolite) is removed from the blood by the kidneys and excreted in the urine.

Collected only for one cohort in Part 1: SAD. Assessment of the PK of GRT7041 and its metabolite, GRT1093025, for single-dosing.

Day 1 to Day 4 (from 0 hours to 72 hours)
Area Under the Concentration-Time Curve from 0 to 24 hours [(AUC)0-24] [MAD]
Time Frame: Day 1 (0 hours - 24 hours)
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing.
Day 1 (0 hours - 24 hours)
Maximum Observed Plasma Concentration (Cmax) [MAD]
Time Frame: Day 1 (0 hours - 24 hours)
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing.
Day 1 (0 hours - 24 hours)
Time to Reach Maximum Observed Plasma Concentration (Tmax) [MAD]
Time Frame: Day 1 (0 hours - 24 hours)
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing.
Day 1 (0 hours - 24 hours)
Area Under the Plasma Concentration-time Curve Over a Dose Interval at Steady State (AUCτ,ss) [MAD]
Time Frame: Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Maximum Observed Plasma Concentration at Steady State (Cmax,ss) [MAD]
Time Frame: Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Minimum Observed Plasma Concentration at Steady State (Cmin,ss) [MAD]
Time Frame: Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Average Observed Plasma Concentration at Steady State (Cav.ss) [MAD]
Time Frame: Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Time to Reach Maximum Observed Plasma Concentration (Tmax) at Steady State (tmax,ss) [MAD]
Time Frame: Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Terminal Elimination Half-Life (t₁/₂) [MAD]
Time Frame: Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Terminal Elimination Rate Constant (λz) [MAD]
Time Frame: Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Apparent Total Clearance of Drug From Plasma After Extravascular Administration (CL/F) [MAD]
Time Frame: Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Apparent Volume of Distribution During the Terminal Phase After Extravascular Administration (Vz/F) [MAD]
Time Frame: Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 1, Day 2, Day 4, Day 6, Day 8, Day 10, and Day 12 to Day 17 and Day 21
Time of Last Measurable Concentration (tlast) [MAD]
Time Frame: Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Assessment of the pharmacokinetics (PK) of GRT7041 and its metabolite, GRT1093025, for multiple-dosing
Day 14 - Day 17 (0 hours to 72 hours after last dose) and Day 21
Maximum Observed Plasma Concentration (Cmax) [SAD] for fed and fasted state
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Assessment of the effect of food on the PK of GRT7041 following single-dosing
Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Area Under the Plasma Concentration-Time Curve from Time 0 to the last measurable concentration (t) [AUC0-t] [SAD] for fed and fasted state
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Assessment of the effect of food on the PK of GRT7041 following single-dosing
Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Area Under the Plasma Concentration-Time Curve from Time 0 extrapolated to infinity (AUC0-inf ) [SAD] for fed and fasted state
Time Frame: Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Assessment of the effect of food on the PK of GRT7041 following single-dosing
Day 1 to Day 4 (Pre-dose, 0 minutes, 15 minutes, 30 minutes, 45 minutes, 1 hour 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 24 hours, 30 hours, 36 hours, 48 hours, 72 hours) and Day 10 (240 hours)
Area Under the Plasma Concentration-Time Curve from Time 0 to the last measurable concentration (t) [AUC0-t] of midazolam
Time Frame: Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
PK parameters (AUC0-t, AUC0-inf, Cmax, tmax and t1/2) of midazolam (index substrate) before and after treatment with GRT7041 over 14 days, and when administered alone and after single day and 14 days of treatment with GRT7041
Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
Area Under the Plasma Concentration-Time Curve from Time 0 extrapolated to infinity (AUC0-inf ) of midazolam
Time Frame: Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
PK parameters (AUC0-t, AUC0-inf, Cmax, tmax and t1/2) of midazolam (index substrate) before and after treatment with GRT7041 over 14 days, and when administered alone and after single day and 14 days of treatment with GRT7041
Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
Maximum Observed Plasma Concentration (Cmax) of midazolam
Time Frame: Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
PK parameters (AUC0-t, AUC0-inf, Cmax, tmax and t1/2) of midazolam (index substrate) before and after treatment with GRT7041 over 14 days, and when administered alone and after single day and 14 days of treatment with GRT7041
Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
Time to Reach Maximum Observed Plasma Concentration (Tmax) of midazolam
Time Frame: Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
PK parameters (AUC0-t, AUC0-inf, Cmax, tmax and t1/2) of midazolam (index substrate) before and after treatment with GRT7041 over 14 days
Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
Terminal Elimination Half-Life (t₁/₂) of midazolam
Time Frame: Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)
PK parameters (AUC0-t, AUC0-inf, Cmax, tmax and t1/2) of midazolam (index substrate) before and after treatment with GRT7041 over 14 days
Day -1, Day 1 and Day 14 (pre-dose, 0.25 hours, 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 10 hours, 12 hours, 15 hours and 18 hours)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 14, 2026

Primary Completion (Estimated)

August 24, 2026

Study Completion (Estimated)

August 28, 2026

Study Registration Dates

First Submitted

November 24, 2025

First Submitted That Met QC Criteria

December 4, 2025

First Posted (Actual)

December 17, 2025

Study Record Updates

Last Update Posted (Actual)

February 20, 2026

Last Update Submitted That Met QC Criteria

February 18, 2026

Last Verified

December 1, 2025

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Information available on the Grünenthal Group Web Site (see URL below for details); according to the European Federation of Pharmaceutical Industries and Associations (EFPIA) Data Sharing Principles.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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