Water and the Gastropressor Response - Tachyphylaxis | NCT00580996

Studies
Water and the Gastropressor Response - Tachyphylaxis

NCT00580996

Sponsor

Satish R. Raj

Status

Active, not recruiting

Last Update Posted

Oct 10, 2025Actual

Enrollment

20Estimated

Phase

Not Applicable

Conditions

Orthostatic Hypotension

Interventions

water high dose
water tiny dose

Countries

United States

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

ID	Type	Description	Link
Vanderbilt Discovery	Other Identifier	Vanderbilt Univeristy

Status Module

Record Verification Date

Oct 2025

Overall Recruitment Status or Expanded Access Status

Active, not recruiting

Last Known Status

Not provided

Delayed Posting

Not provided

Why Stopped

Not provided

Expanded Access Info

Start Date

Jul 2006

Primary Completion Date

Dec 2029Estimated

Completion Date

Dec 2029Estimated

First Submitted Date

Dec 22, 2007

First Submission Date that Met QC Criteria

Dec 22, 2007

First Posted Date

Dec 27, 2007Estimated

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

Oct 8, 2025

Last Update Posted Date

Oct 10, 2025Actual

Sponsor/Collaborators Module

Responsible Party, by Official Title

Satish R. Raj, Assistant Professor of Medicine & Pharmacology, Vanderbilt University Medical CenterSponsor-Investigator

Lead Sponsor

Satish R. RajOTHER

Collaborators

Not provided

Oversight Module

Has Data Monitoring Committee (DMC)

Is FDA Regulated Drug

Not provided

Is FDA Regulated Device

Not provided

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

We are studying the effects of oral water ingestion in patients with orthostatic hypotension. In this study, we are testing the null hypothesis that the blood pressure increase with oral water ingestion will not be diminished if a full prior water dose is given a few hours earlier.

Detailed Description

We are studying the effects of oral water ingestion in patients with orthostatic hypotension. This has been termed the Gastropressor Response. In this study, we are testing the null hypothesis that the blood pressure increase with oral water ingestion will not be diminished if a full prior water dose is given a few hours earlier. In this 2 day study, subjects will be asked to drink with 1 oz or 16 oz of water in the morning followed a few hours later by 16 oz water while the blood pressure is monitored. On the 2nd day, the other dose of water will be given to start, with 16 oz again as the second dose.

Design Module

Study Type

Interventional

Number of References to an Expanded Access Study

Not provided

Expanded Access Types

Not provided

Patient Registry

Not provided

Target Follow-Up Duration

Not provided

Phases

Not Applicable

Interventional Study Design

Allocation

Biospecimen

No data available

No data is available for this block.

Enrollment

20Estimated

Arms/Interventions Module

Arm Groups

Label	Type	Description	Intervention Names
1	Experimental	16 oz water in AM	Other: water high dose
2	Active Comparator	water 1 oz in AM	Other: water tiny dose

Interventions

Name	Type	Description	Arm Group Labels	Other Names
water high dose	Other	water 16 oz PO x 1	1
water tiny dose

Measure	Description	Time Frame
blood pressure		2nd water intervention

Measure	Description	Time Frame
heart rate		2nd intervention

Eligibility Module

Eligibility Criteria

Inclusion Criteria:

orthostatic hypotension (fall in BP>20/10 mmHg)
pressor response to water in other studies
Age 18-80 years

Exclusion Criteria:

pregnancy

Accepts Healthy Volunteers

Sex

All

Sex/Gender Based

Not provided

Sex/Gender Description

Not provided

Minimum Age

18 Years

Maximum Age

80 Years

Standard Ages

AdultOlder Adult

Study Population

Not provided

Sampling Method

Not provided

Contacts/Locations Module

Central Contacts

Not provided

Overall Officials

Name	Affiliation	Role
Satish R Raj, MD MSCI	Vanderbilt University Medical Center	Principal Investigator

Locations

Facility	Status	City	State	ZIP	Country	Contacts
Vanderbilt University		Nashville	Tennessee	37232	United States

Label	URL
Vanderbilt Autonomic Dysfunction Center website	View source

Condition Browse Module

MeSH Terms

ID	Term
D007024	Hypotension, Orthostatic

Ancestor Terms

ID	Term
D054971	Orthostatic Intolerance
D054969	Primary Dysautonomias
D001342	Autonomic Nervous System Diseases
D009422	Nervous System Diseases

Browse Leaves

Not provided

Browse Branches

Not provided

Intervention Browse Module

MeSH Terms

ID	Term
D014867	Water

Ancestor Terms

ID	Term
D006878	Hydroxides
D000468	Alkalies
D007287	Inorganic Chemicals
D000838	Anions
D007477

Browse Leaves

Not provided

Browse Branches

Not provided