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Probiotics, Antibiotics and the Post-Antibiotic Microbiota

Probiotics, Antibiotics and the Post-Antibiotic Microbiota

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07425704
Enrollment
50
Registered
2026-02-23
Start date
2026-04-13
Completion date
2026-12-01
Last updated
2026-03-18

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

Conditions

Microbiome, Probiotic

Brief summary

Antibiotic therapy can cause gastrointestinal dysbiosis and this study will assess the impact of probiotic supplementation on microbiological composition and functionality pre- and post- antibiotic therapy

Interventions

DIETARY_SUPPLEMENTLab4S

Probiotic containing lactic acid bacteria and Saccharomyces boulardii at a dose of 35 billion per day

DIETARY_SUPPLEMENTPlacebo

Placebo

Sponsors

Cultech Ltd
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 40 Years
Healthy volunteers
No

Inclusion criteria

1. Adults, aged 18-40. 2. Been prescribed an oral dose of cephalosporin antibiotic lasting 5 - 10 days. 3. Willing to provide stool samples and, for women, vaginal samples. 4. Willing to avoid consumption of any other probiotic capsules/tablets during the study.

Exclusion criteria

1. If antibiotics prescribed are intended to treat any gastrointestinal or vaginally related issue. 2. Any antibiotic intake within the last 3 months. 3. Immunodeficient or undergoing immunosuppressive therapy. 4. Currently diagnosed with diabetes/cardiovascular disease/cancer/dementia. 5. Any unexplained loss of weight in recent months. 6. Known to be pregnant or \<3 months postpartum.

Design outcomes

Primary

MeasureTime frame
Changes in microbiome composition post antibiotic/interventional treatment through Shotgun MetagenomicsFrom date of randomization until the end of the study (90 days)

Secondary

MeasureTime frameDescription
Questionnaire of gastrointestinal/Vaginal health to measure gastrointestinal/vaginal health post intervention.One month post antibiotic treatment/ intervention (30 days)A daily gastrointestinal/Vaginal health symptom record sheet which involves ticking off symptoms is present.
Bowel habit diary to measure gastrointestinal health post InterventionOne month post antibiotic treatment/ intervention (30 days)A bowel habit diary questionnaire to be completed for every attempted bowel motion during the study. Questions include; 1. Were you able to pass a stool?, 2. Did you feel an urgent need to pass the bowel motion?, 3. Did you strain to start the bowel motion?, 4. Were you left with a feeling of incomplete evacuation?, 5. Please rate the appearance of your bowel motion using the bristol stool score (1-7).

Countries

Bulgaria

Contacts

CONTACTMaya Dabcheva
maya.dabcheva@comac-medical.com+359887113036

Outcome results

None listed

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