Effects of bariatric surgery on paracetamol absorption

Bariatric Surgery and Pharmacokinetics of Paracetamol: BAR-MEDS Paracetamol

Observational Norwegian University of Science and Technology · NCT03538457

This study is trying to see how bariatric surgery affects how well paracetamol works for people getting ready for gastric bypass or sleeve gastrectomy.

Quick facts

Study typeObservational
Enrollment12 (estimated)
Ages18 Years to 70 Years
SexAll
SponsorNorwegian University of Science and Technology Academic / other
Locations1 site (Trondheim)
Trial IDNCT03538457 on ClinicalTrials.gov

What this trial studies

This observational study investigates how bariatric surgery, specifically gastric bypass and sleeve gastrectomy, affects the pharmacokinetics of paracetamol. It aims to understand changes in gastric pH, gastric emptying time, and gastrointestinal transit-time that may influence the biological availability of medications post-surgery. The study will involve patients preparing for these surgical procedures in Central Norway and will assess how these factors alter the effectiveness of paracetamol.

Who should consider this trial

Good fit: Ideal candidates are Norwegian citizens preparing to undergo gastric bypass or sleeve gastrectomy.

Not a fit: Patients who have previously undergone resections in the gastrointestinal tract may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved medication management for patients undergoing bariatric surgery.

How similar studies have performed: While there is limited research on this specific topic, studies on pharmacokinetics after bariatric surgery have shown varying results, indicating a need for further investigation.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Preparing to undergo gastric bypass or sleeve gastrectomy in Central Norway
* Being a Norwegian citizen

Exclusion Criteria:

* Having previously undergone resections in the GI-tract

Where this trial is running

Trondheim

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Obesity, MorbidBariatric surgeryGastrointestinal tractBiological availabilityPharmacokineticsAcetaminophen
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.