This site became the new ClinicalTrials.gov on June 19th. Learn more.
Show more
ClinicalTrials.gov Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...
ClinicalTrials.gov Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more...
ClinicalTrials.gov Menu
Give us feedback

Vitamin D and Blood Pressure

This study has been withdrawn prior to enrollment.
(Inadequate enrollment)
Sponsor:
Collaborator:
Emory University
Information provided by (Responsible Party):
Vin Tangpricha, Atlanta VA Medical Center
ClinicalTrials.gov Identifier:
NCT00459563
First received: April 10, 2007
Last updated: January 7, 2014
Last verified: January 2014
  Purpose
Vitamin D is a natural nutrient in normal daily diet. It can also be made in the skin after exposure to sunlight and is essential for maintaining normal calcium balance. One past study has suggested that vitamin D may be helpful for blood pressure. This study will test whether pills containing cholecalciferol (a form of vitamin D) or calcitriol (the active form of vitamin D) can treat high blood pressure. The investigators plan to enroll up to 80 subjects at the Atlanta VA Medical Center. Participation in the study is expected to last up to 4 weeks. Subjects will be assigned to cholecalciferol, calcitriol or placebo). A 24-hour blood pressure monitor will be worn at the beginning and end of the study to determine blood pressure changes. Renin, PTH, angiotensin-II, and aldosterone levels will also be measured at the beginning and end of the study.

Condition Intervention
Hypertension Drug: Vitamin D Drug: calcitriol Drug: Placebo

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: A Randomized Placebo-controlled Double Blinded Trial to Evaluate Cholecalciferol (Vitamin D3) and Calcitriol Treatment on Reducing Blood Pressure in Middle Aged Adults With Stage I Hypertension and Vitamin D Deficiency

Resource links provided by NLM:


Further study details as provided by Vin Tangpricha, Atlanta VA Medical Center:

Primary Outcome Measures:
  • Blood pressure [ Time Frame: 3 Weeks ]
  • 25(OH)D [ Time Frame: 3 weeks ]

Secondary Outcome Measures:
  • Parathyroid hormone [ Time Frame: 3 weeks ]
  • Renin [ Time Frame: 3 weeks ]
  • Aldosterone [ Time Frame: 3 weeks ]
  • Angiotensin II [ Time Frame: 3 weeks ]

Enrollment: 0
Study Start Date: March 2007
Study Completion Date: December 2011
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Placebo Drug: Placebo
Placebo once a week for 3 weeks
Active Comparator: Cholecalciferol
Cholecalciferol
Drug: Vitamin D
200,000 IU once weekly for 3 weeks (600,000 IU total dose)
Active Comparator: Calcitriol
Calcitriol
Drug: calcitriol
calcitriol 0.5 mcg twice a day for 1 week

  Eligibility

Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Participants must be over the age of 18
  • Vitamin D levels between 10 and 30 ng/ml
  • Systolic blood pressure between 130 and 150 mmHg

Exclusion Criteria:

  • Current use of anti-hypertensive medication
  • Inability to understand the consent form
  • Inability to return ABP monitor within 24-48 hours after visit
  • Alcohol dependence
  • Diagnosis of chronic kidney disease
  • History of heart disease
  • History of stroke
  • Inability to comply with study protocol
  • Current treatment for cancer
  • Narcotic dependence
  • Current use of greater than 2000 IU of vitamin D
  • Pregnant
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00459563

Locations
United States, Georgia
VAMC
Decatur, Georgia, United States, 30033
Sponsors and Collaborators
Atlanta VA Medical Center
Emory University
Investigators
Principal Investigator: Vin Tangpricha, MD/PhD Emory University/VAMC
Study Director: Suzanne E Judd, MPH Emory University
  More Information

Responsible Party: Vin Tangpricha, Staff Physician, Atlanta VA Medical Center
ClinicalTrials.gov Identifier: NCT00459563     History of Changes
Other Study ID Numbers: 648-2006
VAMC Atlanta R&D AREF 283001
Study First Received: April 10, 2007
Last Updated: January 7, 2014

Keywords provided by Vin Tangpricha, Atlanta VA Medical Center:
vitamin D
blood pressure
hypertension
Vitamin D insufficient
Systolic blood pressure between 130 and 150 mmHg

Additional relevant MeSH terms:
Hypertension
Vascular Diseases
Cardiovascular Diseases
Vitamins
Vitamin D
Ergocalciferols
Cholecalciferol
Calcitriol
Micronutrients
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents
Calcium Channel Agonists
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Vasoconstrictor Agents

ClinicalTrials.gov processed this record on August 18, 2017