Bariatric Surgery and Pharmacokinetics of Hydrochlorothia... | NCT03476551

Studies
Bariatric Surgery and Pharmacokinetics of Hydrochlorothiazide

NCT03476551

Sponsor

Norwegian University of Science and Technology

Status

Recruiting

Last Update Posted

Jul 8, 2026Actual

Enrollment

12Estimated

Phase

Not provided

Conditions

Obesity, Morbid

Interventions

Hydrochlorothiazide

Countries

Norway

Protocol Section

Identification Module Status Module Sponsor/Collaborators Module Oversight Module Description Module Conditions Module Design Module Arms/Interventions Module Outcomes Module Eligibility Module Contacts/Locations Module References Module IPD Sharing Statement Module

Results Section

Participant Flow Module Baseline Characteristics Module Outcome Measures Module Adverse Events Module More Info Module

Annotation Section

Annotation Module

Document Section

Large Document Module

Derived Section

Miscellaneous Info Module Condition Browse Module Intervention Browse Module

Protocol Section

Identification Module

NCT ID

Results Section

No data available

No data is available for this block.

Annotation Section

No data available

No data is available for this block.

Document Section

No data available

No data is available for this block.

Derived Section

Miscellaneous Info Module

Version Holder

Status Module

Record Verification Date

Jul 2026

Overall Recruitment Status or Expanded Access Status

Recruiting

Last Known Status

Not provided

Delayed Posting

Not provided

Why Stopped

Not provided

Expanded Access Info

Start Date

Nov 2, 2016Actual

Primary Completion Date

Oct 2026Estimated

Completion Date

Oct 2026Estimated

First Submitted Date

Mar 19, 2018

First Submission Date that Met QC Criteria

Mar 19, 2018

First Posted Date

Mar 26, 2018Actual

Results Waived

Not provided

Results First Submitted Date

Not provided

Results First Submitted that Met QC Criteria

Not provided

Results First Posted Date

Not provided

Certification/Extension (aka Delayed Results) First Submitted Date

Not provided

Certification/Extension First Submitted that Passed QC Review

Not provided

Certification/Extension First Posted Date

Not provided

Last Update Submitted Date

Jul 6, 2026

Last Update Posted Date

Jul 8, 2026Actual

Name	Class
St. Olavs Hospital	OTHER
Volvat Medisinsk Senter Stokkan	OTHER
Namsos Hospital	OTHER
Alesund Hospital

Oversight Module

Has Data Monitoring Committee (DMC)

Is FDA Regulated Drug

Is FDA Regulated Device

Is Unapproved Device

Not provided

Pediatric Postmarket Surveillance of a Device Product

Not provided

Product Exported from US

Not provided

FDAAA801 Violation

Not provided

Description Module

Brief Summary

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 hydrochlorothiazide are investigated.

Detailed Description

Not provided

Design Module

Study Type

Observational

Number of References to an Expanded Access Study

Not provided

Expanded Access Types

Not provided

Patient Registry

Target Follow-Up Duration

Not provided

Phases

Not provided

Interventional Study Design

Allocation

Not provided

Intervention Model

Biospecimen

Retention

Enrollment

12Estimated

Arms/Interventions Module

Arm Groups

Not provided

Interventions

Name	Type	Description	Arm Group Labels	Other Names
Hydrochlorothiazide	Drug	Patients are tested for their normal prescription hydrochlorothiazide medication		Dichlothiazide Esidrix Hypothiazide

Outcomes Module

Primary Outcomes

Measure	Description	Time Frame
Hydrochlorothiazide concentration in blood serum (area under curve (AUC))		From baseline to 1 year postoperatively

Secondary Outcomes

Not provided

Other Outcomes

Not provided

Eligibility Module

Eligibility 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

Accepts Healthy Volunteers

Sex

All

Sex/Gender Based

Not provided

Sex/Gender Description

Not provided

Minimum Age

18 Years

Maximum Age

70 Years

Standard Ages

AdultOlder Adult

Study Population

Patients referred for bariatric surgery (gastric bypass or sleeve gastrectomy)

Sampling Method

Non-Probability Sample

Contacts/Locations Module

Central Contacts

Name	Role	Phone	Extension	Email
Magnus Strømmen, MSc	Contact	0047 72829970		magnus.strommen@stolav.no

Overall Officials

Name	Affiliation	Role
Magnus Strømmen, MSc	St. Olavs Hospital	Principal Investigator

Locations

Facility	Status	City	State	ZIP	Country	Contacts
St. Olavs University Hospital	Recruiting	Trondheim			Norway

IPD Sharing Statement Module

Plan to Share IPD

Undecided

Description

Not provided

Types

Not provided

Time Frame

Not provided

Access Criteria

Not provided

URL

Not provided

Condition Browse Module

MeSH Terms

ID	Term
D009767	Obesity, Morbid

Ancestor Terms

ID	Term
D009765	Obesity
D050177	Overweight
D044343	Overnutrition
D009748	Nutrition Disorders

Browse Leaves

Not provided

Browse Branches

Not provided

Intervention Browse Module

MeSH Terms

ID	Term
D006852	Hydrochlorothiazide

Ancestor Terms

ID	Term
D002740	Chlorothiazide
D001581	Benzothiadiazines
D013449	Sulfonamides
D013450	Sulfones

Browse Leaves

Not provided

Browse Branches

Not provided