Effects of bariatric surgery on the absorption of apixaban

Bariatric Surgery and Pharmacokinetics of Apixaban: BAR-MEDS Apixaban

Observational Norwegian University of Science and Technology · NCT03448783

This study is testing how bariatric surgery affects the way the blood thinner apixaban is absorbed in patients getting ready for the surgery.

Quick facts

Study typeObservational
Enrollment12 (estimated)
Ages18 Years to 70 Years
SexAll
SponsorNorwegian University of Science and Technology Academic / other
Locations1 site (Trondheim)
Trial IDNCT03448783 on ClinicalTrials.gov

What this trial studies

This observational study investigates how bariatric surgery, specifically gastric bypass and sleeve gastrectomy, affects the pharmacokinetics of the anticoagulant medication apixaban. It aims to understand changes in gastric pH, gastric emptying time, and gastrointestinal transit-time that may influence the biological availability of the drug. By examining these factors, the study seeks to provide insights into optimal medication management for patients undergoing bariatric procedures. The research is conducted in Central Norway, focusing on individuals preparing for surgery.

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 and safety for patients undergoing bariatric surgery.

How similar studies have performed: While there is limited research specifically on apixaban, studies on pharmacokinetics post-bariatric surgery have shown varying effects on medication absorption, 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 availabilityPharmacokineticsApixaban
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.