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A Study to Assess the Concentration of Bimekizumab in Mature Breast Milk From Mothers Receiving Treatment With Bimzelx® (Bimekizumab)

A Multicenter Open-label, Prospective Study to Assess the Concentration of Bimekizumab in Mature Breast Milk From Mothers Receiving Treatment With Bimzelx® (Bimekizumab)

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06888193
Acronym
BE CARING
Enrollment
20
Registered
2025-03-21
Start date
2025-11-05
Completion date
2027-12-31
Last updated
2026-09-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Axial Spondyloarthritis, Hidradenitis Suppurativa, Moderate to Severe Plaque Psoriasis, Psoriatic Arthritis

Keywords

Bimekizumab, Breastfeeding mothers, Bimzelx®, PSO, HS, AxSpa, PsA

Brief summary

Primary purpose of the study is to assess the concentration of bimekizumab in mature human breast milk.

Interventions

DRUGBimekizumab

Bimekizumab under the care of their treating physician.

Sponsors

UCB Biopharma SRL
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Study participant must be at least 18 years of age at the time of signing the informed consent. * Study participant is being treated with commercial bimekizumab per locally approved prescribing information and in accordance with her treating physician. * Study participant is breastfeeding and intends to breastfeed throughout the Sampling Period. * The decision to treat with bimekizumab and to breastfeed is made independently from and prior to the study participant consenting to participate in the study. * Study participant must be on bimekizumab treatment for at least 12 weeks after delivery and since starting/restarting/continuing bimekizumab prior to sampling (prior to start of the Sampling Period). * A female study participant is eligible to participate if she is not pregnant and does not plan to become pregnant during the study.

Exclusion criteria

* Study participant has any medical, obstetrical, or psychiatric condition that, in the opinion of the Investigator, could jeopardize or would compromise the study participant's ability to participate in this study. * The infant has any abnormality noted on physical examination or medical history that, in the opinion of the Investigator, may jeopardize or compromise study participation. * Study participant has a history of chronic alcohol or drug abuse within the previous last year. * Study participant has history of breast implants, breast augmentation, or breast reduction surgery. * Study participant plans a surgical intervention during the Screening Period and Sampling Period or anticipates having surgery while participating in the Sampling Period (does not apply to tubal ligation). * Study participant or her infant has participated in another study of an investigational medicinal product (IMP) (and/or an investigational device) within the previous 6 months or is currently participating in another study of an IMP (and/or an investigational device), unless the study is UCB PS0036 or a bimekizumab registry study. * Study participant or her infant has previously participated (ie, entered the sampling period) in this study.

Design outcomes

Primary

MeasureTime frameDescription
Concentration of bimekizumab in the breast milk on Day 1Day 1Breast milk samples will be collected predose on Day 1.
Concentration of bimekizumab in the breast milk on Day 2Day 2Breast milk samples will be collected predose on Day 2.
Concentration of bimekizumab in the breast milk on Day 3Day 3Breast milk samples will be collected predose on Day 3.
Concentration of bimekizumab in the breast milk on Day 5Day 5Breast milk samples will be collected predose on Day 5.
Concentration of bimekizumab in the breast milk on Day 7Day 7Breast milk samples will be collected predose on Day 7.
Concentration of bimekizumab in the breast milk on Day 9Day 9Breast milk samples will be collected predose on Day 9.
Concentration of bimekizumab in the breast milk on Day 11Day 11Breast milk samples will be collected predose on Day 11.
Concentration of bimekizumab in the breast milk on Day 13Day 13Breast milk samples will be collected predose on Day 13.
Concentration of bimekizumab in the breast milk on Day 15Day 15Breast milk samples will be collected predose on Day 15.
Concentration of bimekizumab in the breast milk on Day 29Day 29Breast milk samples will be collected predose on Day 29 for mothers on every 4 weeks (Q4W) dosing regimen.
Concentration of bimekizumab in the breast milk on Day 57Day 57Breast milk samples will be collected predose on Day 57 for mothers on every 8 weeks (Q8W) dosing regimen.

Secondary

MeasureTime frameDescription
Estimated Infant Dosage of bimekizumab from breast milkPredose on Day 1, 2, 3, 5, 7, 9, 11, 13, 15, 29 and 57Breast milk samples will be collected predose on Day 1 (bimekizumab dosing day), Days 2, 3, 5, 7, 9, 11, 13, and 15 for all study participants (Day 15 predose if every 2 weeks (Q2W) dosing regimen), predose on Day 29 (if Q4W dosing regimen) or Day 57 (if Q8W dosing regimen).
Relative Infant Dose of bimekizumab from breast milkPredose on Day 1, 2, 3, 5, 7, 9, 11, 13, 15, 29 and 57Breast milk samples will be collected predose on Day 1 (bimekizumab dosing day), Days 2, 3, 5, 7, 9, 11, 13, and 15 for all study participants (Day 15 predose if every 2 weeks (Q2W) dosing regimen), predose on Day 29 (if Q4W dosing regimen) or Day 57 (if Q8W dosing regimen).
Treatment-emergent Adverse Events (TEAEs) of the mother from time of informed consent through SFU contactFrom time of informed consent up to approximately 17 weeksAn AE is any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication.

Countries

Canada, Germany, Spain, Switzerland, United States

Contacts

CONTACTUCB Cares
ucbcares@ucb.com1-844-599-2273 (USA)
STUDY_DIRECTORUCB Cares

001 844 599 2273

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 19, 2026