How Weight-Loss Surgery Affects the Body's Handling of Venlafaxine
Studies how the body processes venlafaxine in adults with severe obesity after surgery.
Plain-language title generated from the registry record
Registry title: Bariatric Surgery and Pharmacokinetics of Venlafaxine
Key facts
- Where
- Trondheim, NorwaySee the site
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 18 and 70 years old?
Source: NCT03532477, who can take part
Where in Norway
- St. Olavs University HospitalTrondheim, NorwayTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Norwegian University of Science and Technology
- Trial code
- NCT03532477
- Record updated
- 14 October 2026
- Original description
Changes to gastric pH, gastric emptying time, gastrointestinal transit-time or the pre-systemic metabolizing effect of enzymes secreted in the mucosa may all alter the pharmacokinetics of medicines. These factors are potentially influenced by bariatric surgery. Little is so far known about how gastric bypass and sleeve gastrectomy impacts the biological availability of medication. In this study the pharmacokinetic effects of bariatric surgery on venlafaxine are investigated.Read full original descriptionShow less
Bariatric Surgery and Pharmacokinetics of Venlafaxine: BAR-MEDS Venlafaxine
Changes to gastric pH, gastric emptying time, gastrointestinal transit-time or the pre-systemic metabolizing effect of enzymes secreted in the mucosa may all alter the pharmacokinetics of medicines. These factors are potentially influenced by bariatric surgery. Little is so far known about how gastric bypass and sleeve gastrectomy impacts the biological availability of medication. In this study the pharmacokinetic effects of bariatric surgery on venlafaxine are investigated.
Inclusion: Preparing to undergo gastric bypass or sleeve gastrectomy in Central Norway; Being a Norwegian citizen.
Exclusion: Having previously undergone resections in the GI-tract.