Could this drug ease constipation in the littlest ones?
NCT ID NCT05760313
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested a medicine called linaclotide in 19 babies and toddlers (6 months to under 2 years old) with long-term constipation. The goal was to see if it helps them have more bowel movements and softer stools, and to check for side effects. Children took the medicine as a liquid once a day for 4 weeks. Some children received a placebo (a dummy treatment) instead.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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19 people
The number who actually took part.
- Started
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Apr 2023
- Finished
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Jun 2025
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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6 to 23 months
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Individuals must be 6 months to less than 1 year and 11 months old, at the time the legally authorized representative (LAR)/parent/guardian signs the informed consent in alignment with local requirements. * The LAR/parent/guardian who will be completing the electronic diary (eDiary) is able to read and understand the assessments in the eDiary device and must undergo training. * Participant meets Rome IV criteria for functional constipation (FC): for at least 1 month before Screening (Visit 1), the participant must meet 2 or more of the following: * 2 or fewer defecations per week (with each defecation occurring in the absence of any laxative, suppository, or enema use during the preceding 24 hours) * History of excessive stool retention * History of painful or hard bowel movements (BMs) * History of large-diameter stools * Presence of a large fecal mass in the rectum * LAR/Parent/Guardian is willing to discontinue any laxatives used before the Preintervention Visit in favor of the protocol-permitted rescue medicine. Exclusion Criteria: * Participant has conditions that could interfere with drug absorption, including, but not limited to, short bowel syndrome. * History of clinically significant medical conditions or any other reason that the investigator determines would interfere with the individual's participation in this study or would make the participant an unsuitable candidate to receive study drug. * Participant has history of: * Celiac disease, or positive serological test for celiac disease or the condition is suspected but has not been ruled out by endoscopic biopsy * Cystic fibrosis * Hypothyroidism that is untreated or treated with thyroid hormone at a dose that has not been stable for at least 3 months prior to Screening (Visit 1) * Down's syndrome or any other chromosomal disorder * Active anal fissure (investigator has confirmed an active anal fissure and participant reports known anal fissure symptoms \[i.e., streaks of blood on the stool or on diaper or toilet paper and pain/crying with bowel movement within 2 weeks prior to Screening\]). (Note: Anal fissures that have resolved at least 2 weeks prior to screening would not be exclusionary). However, if in the investigator's opinion, an anal fissure(s) may be the primary cause of participant's Rome IV FC criteria, the subject would not be eligible to participate in the study. * Anatomic malformations (e.g., imperforate anus, anal stenosis, anterior displaced anus) * Intestinal nerve or muscle disorders (e.g., Hirschprung disease, visceral myopathies, visceral neuropathies) * Neuropathic conditions (e.g., spinal cord abnormalities, neurofibromatosis, tethered cord, spinal cord trauma) * Lead toxicity, hypercalcemia * Inflammatory bowel disease * Lactose intolerance that is associated with symptoms which could confound the assessments in this study * History of cancer. (Note: Participants with a history of cancer are allowed provided that the malignancy has been in a complete remission before enrollment/randomization (Visit 3). A complete remission is defined as the disappearance of all signs of cancer in response to treatment)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Acibadem City Clinic Tokuda University Hospital EAD /ID# 251232
Sofia, 1407, Bulgaria
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Advanced Research Center /ID# 248763
Anaheim, California, 92805, United States
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ClinPoint Trials /ID# 251534
Waxahachie, Texas, 75165-1430, United States
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Coastal Pediatric Research - Summerville /ID# 253534
Summerville, South Carolina, 29486, United States
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Coastal Pediatric Research - West Ashley B /ID# 248693
Charleston, South Carolina, 29414, United States
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Debreceni Egyetem-Klinikai Kozpont /ID# 250793
Debrecen, Hajdú-Bihar, 4032, Hungary
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Disc_Barts Health NHS Trust - The Royal London Hospital /ID# 252298
London, Greater London, E1 2ES, United Kingdom
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Frederick County Pediatrics /ID# 251555
New Market, Maryland, 21774-6154, United States
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Great Ormond Street Children's Hospital /ID# 253333
London, Greater London, WC1N 3HZ, United Kingdom
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HELIOS Klinikum Wuppertal /ID# 249022
Wuppertal, 42283, Germany
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HealthStar Research of Hot Springs PLLC /ID# 251553
Hot Springs, Arkansas, 71913, United States
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Houston Clinical Research Associates /ID# 261571
Houston, Texas, 77090-2633, United States
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Institut za zdravstvenu zastitu majke i deteta Srbije Dr Vukan Cupic /ID# 252485
Belgrade, Beograd, 11000, Serbia
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Institute for Child and Youth Health Care of Vojvodina /ID# 252482
Novi Sad, 21000, Serbia
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Kinderarztpraxis Dr. Froehlich /ID# 252050
Forchheim, 91301, Germany
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Kindred Medical Institute - Corona /ID# 251535
Corona, California, 92879-3104, United States
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Klinicki bolnicki centar Osijek /ID# 252795
Osijek, County of Osijek-Baranja, 31000, Croatia
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Klinicki bolnicki centar Sestre milosrdnice /ID# 252798
Zagreb, City of Zagreb, 10000, Croatia
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Klinicki bolnicki centar Zagreb /ID# 252796
Zagreb, City of Zagreb, 10000, Croatia
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Klinika za dječje bolesti Zagreb /ID# 252792
Zagreb, City of Zagreb, 10000, Croatia
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Michigan Center of Medical Research /ID# 253536
Farmington Hills, Michigan, 48334, United States
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Norfolk and Norwich University Hospitals NHS Foundation Trust /ID# 252299
Norwich, Norfolk, NR4 7UY, United Kingdom
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Nova Clinic /ID# 249023
Varna, 9000, Bulgaria
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Prime Clinical Research - Mansfield - East Broad Street /ID# 262947
Mansfield, Texas, 76063, United States
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Prohealth Research Center /ID# 248696
Doral, Florida, 33166, United States
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Russells Hall Hospital /ID# 252660
Dudley, DY1 2HQ, United Kingdom
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South Miami Medical & Research Group Inc. /ID# 248765
Miami, Florida, 33155, United States
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Specialized Hospital For Active Treatment Of Children Diseases Prof. Ivan Mitev /ID# 251229
Sofia, 1606, Bulgaria
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UMHAT Kanev /ID# 248931
Rousse, 7002, Bulgaria
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UMHAT Sveti Georgi /ID# 250808
Plovdiv, 4002, Bulgaria
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Universitaetsklinikum Muenster /ID# 251965
Münster, North Rhine-Westphalia, 48149, Germany
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University Children's Hospital 'Tirsova' /ID# 252483
Belgrade, Beograd, 11000, Serbia
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Valencia Medical & Research Center /ID# 251533
Miami, Florida, 33165, United States
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Velocity Clinical Research - Lafayette /ID# 263873
Lafayette, Louisiana, 70508, United States
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Velocity Clinical Research - Phoenix /ID# 263871
Phoenix, Arizona, 85006, United States
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Velocity Clinical Research Macon /ID# 263959
Macon, Georgia, 31210-6583, United States
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Velocity Clinical Research Washington DC /ID# 263872
Washington D.C., District of Columbia, 20016-4300, United States
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Velocity Clinical Research- Hastings Nebraska /ID# 260932
Hastings, Nebraska, 68901-2640, United States
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Other studies related to the condition(s) this trial covers.
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