A Study to Learn How the Study Medicine Called Etrasimod is Taken up Into Blood and Breastmilk of… (NCT07153159) | Clinical Trial Compass
RecruitingPhase 1
A Study to Learn How the Study Medicine Called Etrasimod is Taken up Into Blood and Breastmilk of Healthy Breastfeeding Women
Belgium8 participantsStarted 2025-08-07
Plain-language summary
This study aims to figure out how much etrasimod, a medication, ends up in breast milk after taking it for several days. To do this, the researchers will work with at least 8 healthy women who are breastfeeding. These women will take a 2 mg dose of etrasimod every day for 7 days while staying at the testing site. During the study, they won't be allowed to breastfeed their babies to keep the babies safe. Instead, they need to have another plan for feeding their babies during this time. The study will look at how the medication is absorbed and how it moves through the body, checking things like the highest level in the blood and how long it takes to reach that level. The researchers will also see how much of the drug is in the breast milk compared to the blood and whether it's safe for the women to take. After the last dose, the women will stay at the site for at least another 24 hours before going home, and follow-up safety calls will be made about 14 and 28 to 35 days later. The whole process from start to finish will take about 10 weeks
Who can participate
Age range
18 Years – 55 Years
Sex
FEMALE
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Healthy (as determined by medical evaluation including medical history, physical examination, laboratory tests, vital signs and 12-lead ECGs) lactating women who are actively breastfeeding or expressing breast milk, who are at least 12 weeks post partum and not currently pregnant (must have a negative pregnancy test), and must be 18 to 55 years of age, inclusive, at the time of signing the informed consent document (ICD).
. Body mass index (BMI) of 16-35 kg/m2; and a total body weight \>45 kg (99 lb).
. Participants must be willing to temporarily discontinue breastfeeding their infants for a total of 21 days, ie, from the evening of the day before Day 1 through to 14 days after the last dose (approximately 8 AM the morning of Day 21). Participants must be willing to regularly pump breasts throughout the study and express breast milk according to a schedule designed to maintain lactation until the completion of breast milk collection
Exclusion criteria
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Area under the etrasimod concentration-time curve in breast milk
Timeframe: Baseline (Day -1), Day 1, Day 7 and Day 8.
2
Maximum observed concentration of etrasimod in breast milk
Timeframe: Baseline (Day -1), Day 1, Day 7 and Day 8.
3
Amount of etrasimod excreted in breast milk
Timeframe: Baseline (Day -1), Day 1, Day 7 and Day 8.
4
Percent of etrasimod dose excreted in breast milk
Timeframe: Baseline (Day -1), Day 1, Day 7 and Day 8.
5
Breast milk clearance of etrasimod
Timeframe: Baseline through Day 8
6
Time to maximum observed concentration of etrasimod
Timeframe: Baseline (Day -1), Day 1, Day 7 and Day 8.
. Evidence or history of clinically significant hematological, renal, endocrine, pulmonary (such as moderate or severe chronic pulmonary disorders like asthma or chronic obstructive pulmonary disease \[COPD\]), gastrointestinal, cardiovascular, hepatic, neurological/psychiatric, anaphylactic, ophthalmologic disorders (such as macular edema, uveitis, retinopathy), or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing).
. Participants with history or presence of second-degree or third-degree atrioventricular (AV) block, sick sinus syndrome, or sinoatrial block.
. Resting HR \<50 bpm at Screening or pre-randomization on Day 1. Measurement can be repeated up to 3 times to confirm the finding. Mean values will be used if repeated.
. Recurrent symptomatic bradycardia or recurrent cardiogenic syncope
. Any condition possibly affecting drug absorption (eg, gastrectomy, cholecystectomy).
. Known immunodeficiency disorder, including positive serology for human immunodeficiency virus (HIV), or a first degree relative with a hereditary immunodeficiency, and history of organ transplant (except corneal transplant).
. History or evidence of hepatitis B or hepatitis C viruses. Hepatitis B vaccination is allowed.89.
. Participants with any of the acute or chronic infections or infection history