Drug-drug Interaction Study With GLPG3667 and Midazolam in Healthy Subjects

Study Overview
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Brief Summary
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A study in healthy volunteers to look at the effect of the test medicine, GLPG3667, on how midazolam (MDZ) is taken up and eliminated by the body.

Official Title
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An Open-label, Fixed-sequence, Drug-drug Interaction Study in Healthy Subjects to Evaluate the Effect of GLPG3667 on the Pharmacokinetics of Midazolam, a Sensitive Index Substrate of CYP3A4

Conditions
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Healthy

Intervention / Treatment
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* Drug: GLPG3667
* Drug: Midazolam


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or female between 18 and 55 years of age (extremes included), on the date of signing the informed consent form. Female subjects should be of non-childbearing potential, defined as permanently surgically sterile (bilateral oophorectomy, i.e. surgical removal of ovaries, bilateral salpingectomy, i.e. surgical removal of the fallopian tubes, or hysterectomy, i.e. surgical removal of uterus), or with no menses for 12 or more months without an alternative medical cause AND a follicle-stimulating hormone level in the postmenopausal range. These female subjects must also have a negative pregnancy test. For surgical sterilization, documented confirmation will be requested. A body mass index between 18.0 and 30.0 kg/m², inclusive. Judged to be in good health by the investigator based upon the results of a medical history, physical examination, vital signs, 12-lead electrocardiogram (ECG), and fasting clinical laboratory safety tests available at screening and prior to enrolment. Neutrophil, lymphocyte, and platelet counts must be above the lower limit of normal range. Total bilirubin, aspartate aminotransferase, and alanine aminotransferase must be within normal ranges. Other clinical laboratory safety test results must be within the reference ranges or test results that are outside the reference ranges need to be considered not clinically significant in the opinion of the investigator. This list only contains the key inclusion criteria. Exclusion Criteria: Known hypersensitivity to investigational product (IP) and/or MDZ ingredients or history of a significant allergic reaction to IP and/or MDZ ingredients as determined by the investigator. Treatment with any medication (including over-the-counter and/or prescription medication, dietary supplements, nutraceuticals, vitamins and/or herbal supplements, and hormonal replacement therapy for postmenopausal subjects) except occasional paracetamol (maximum dose of 2 g/day and maximum of 10 g/2 weeks) in the last 2 weeks or 5 half-lives of the drug, whichever is longer, prior to the first dosing. This list only contains the key exclusion criteria.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: GLPG3667 + Midazolam<br> | Drug: GLPG3667<br>* From Day 3 to Day 8, GLPG3667 capsules q.d. orally in fed state.<br>Drug: Midazolam<br>* On Day 1 and Day 7 as liquid formulation, orally in fed state.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Area under the plasma concentration-time curve from time zero to infinity (AUC0-inf) of MDZ | To determine the effect of GLPG3667 on the pharmacokinetics (PK) of MDZ. | From Day 1 until Day 9 | 
| Maximum observed plasma concentration (Cmax) of MDZ | To determine the effect of GLPG3667 on the PK of MDZ. | From Day 1 until Day 9 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cmax of GLPG3667 | To evaluate the PK of GLPG3667 in the presence of a single dose of MDZ. | From Day 3 until Day 8 | 
| Area under the plasma concentration-time curve over the dosing interval (AUCτ) for GLPG3667 | To evaluate the PK of GLPG3667 in the presence of a single dose of MDZ. | From Day 3 until Day 8 | 
| Trough plasma concentration observed (Ct) for GLPG3667 | To evaluate the PK of GLPG3667 in the presence of a single dose of MDZ. | From Day 3 until Day 8 | 
| Frequency and severity of treatment-emergent adverse events (TEAEs), treatment-emergent serious adverse events (SAEs), and TEAEs leading to treatment discontinuations. | To evaluate the safety and tolerability of GLPG3667 alone or when coadministered with MDZ. | From Day 1 through study completion, an average of 3 weeks |