Value of Liquid Potassium Magnesium Citrate in Controlling Hypertension

October 12, 2023 updated by: Wanpen Vongpatanasin, University of Texas Southwestern Medical Center
In the DASH (Dietary Approaches to Stop Hypertension) trials, a diet rich in fruits, vegetables, nuts and dairy products, and limited in fat content, was shown to be useful in controlling hypertension. Key components of such a diet are potassium, magnesium and alkali, each of which has been implicated in lowering blood pressure. Whether a liquid formulation of potassium-magnesium citrate will result in equivalent BP effect as the DASH diet is unknown.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The DASH diet is rich in potassium and magnesium. It is also high in alkali content, since the anions are provided mostly by citrate rather than chloride. Considerable data are already available in the literature invoking a protective role on hypertension of potassium, magnesium and alkali.

In this protocol, the investigators want to test the hypothesis that liquid potassium-magnesium citrate (KMgCit) as a pharmaceutical formulation could serve as a surrogate for the DASH diet, and would lower blood pressure among patients with pre- or Stage I hypertension on their customary diet.

Each subject will participate in all four phases, chosen in random order. The four phases will be: Placebo Phase (microcrystalline cellulose in water), Potassium Chloride Phase (potassium chloride powder in water), Potassium Citrate Phase (potassium citrate powder in water), KMgCit Phase (KMgCit powder in water) During each phase, subjects will receive one of the test drugs for 4 weeks, followed by at least 1 week of withdrawal. Change in 24 hr BP, office BP will be measured at baseline and after each phase. Central aortic blood pressure and carotid-femoral pulse wave velocity, -terminal-telopeptide (CTX), 24 hr urine electrolytes will be measured at 4 weeks in each phase.

Study Type

Interventional

Enrollment (Actual)

30

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Texas
      • Dallas, Texas, United States, 75390
        • University of Texas Southwestern Medical Center at Dallas

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

21 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients with pre- or Stage I hypertension, with systolic blood pressure of 120-159 mm and diastolic of 80-99 mm
  • Age > 21 years of age

Exclusion Criteria:

  • Diabetes mellitus,
  • Renal impairment (serum creatinine > 1.4 mg/dL),
  • Any heart diseases such as congestive heart failure or sustained arrhythmia,
  • Chronic NSAID use,
  • Treatment with diuretics,
  • Gastroesophageal reflux disease (GERD) requiring treatment with acid reducing agents or antacid more than once a week,
  • Esophageal-gastric ulcer,
  • Chronic diarrhea
  • Hyperkalemia (serum > 4.6 mmol/L for patients on Angiotensin converting enzyme (ACE) inhibitors or Angiotensin receptor blockers (ARB), serum K > 5.0 for patient not on ACE inhibitors or ARBs)
  • Liver function test above upper limit of normal range.
  • Subjects who require any potassium supplement on a regular basis from any reasons
  • Pregnancy
  • History of major depression, bipolar disorder, or schizophrenia
  • History of substance abuse.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Potassium magnesium Citrate (KMgCit) arm
Potassium magnesium citrate will be prepared by mixing potassium citrate, magnesium citrate and/or citric acid by Meta Pharm Development. The content of each sachet will be dissolved in 250 ml water and will be drunk with breakfast and again with dinner during the KMgCit Phase, to deliver 40 meq K, 20 meq Mg and 74 meq citrate per day for 4 weeks
Drug: Potassium magnesium Citrate (KMgCit)
Experimental: Potassium citrate arm
A special sachet formulation containing 20 meq K/sachet will be made for the study by Meta Pharm Development. The contents of a sachet will be added to 250 ml water and drunk with breakfast and dinner, to deliver 40 meq K (as citrate) per day during the Potassium Citrate Phase for 4 weeks.
Drug: Potassium citrate powder
Other Names:
  • Urocit®-K powder
Experimental: Potassium chloride arm
Potassium chloride will contain 20 meq KCl per sachet. During the Potassium Chloride Phase, subjects will dissolve the content of each sachet in 250 ml water and ingest it with breakfast and again with dinner, to deliver 40 meq K (as chloride) per day for 4 weeks
Drug: Potassium chloride powder
Placebo Comparator: Placebo
Placebo will comprise microcrystalline cellulose, equivalent in volume in each sachet as other test products. During the Placebo Phase, subjects will dissolve the entire content of a sachet in 250 ml water and drink it with breakfast and again with dinner for 4 weeks.
Drug: Placebo

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
24-hour Average Systolic Blood Pressure
Time Frame: 4 weeks
Systolic blood pressure was measured through an ambulatory blood pressure monitoring device worn by each participant for 24 hours after completing each treatment phase. This devise measures blood pressure intermittently throughout the day and night and provides the average of all readings.
4 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Texas Southwestern Medical Center

Investigators

  • Principal Investigator: Wanpen Vongpatanasin, MD, UT Southwestern Medical Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2012

Primary Completion (Actual)

January 1, 2015

Study Completion (Actual)

January 1, 2015

Study Registration Dates

First Submitted

January 8, 2016

First Submitted That Met QC Criteria

January 11, 2016

First Posted (Estimated)

January 12, 2016

Study Record Updates

Last Update Posted (Actual)

October 16, 2023

Last Update Submitted That Met QC Criteria

October 12, 2023

Last Verified

October 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • STU 072012-001

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Hypertension

Clinical Trials on Placebo

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Brazil

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

3
Subscribe