This site became the new on June 19th. Learn more.
Show more 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... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

Safety of Vitamin D Supplementation in Older Persons

This study has been completed.
Merck Sharp & Dohme Corp.
Information provided by (Responsible Party):
Silvina Levis, MD, University of Miami Identifier:
First received: May 15, 2008
Last updated: December 2, 2016
Last verified: December 2016
This study will evaluate the safety over 6 months of two different doses of vitamin D (cholecalciferol) in men and women age 65 and older. It will also evaluate if supplementation with vitamin D improves physical performance.

Condition Intervention Phase
Vitamin D Deficiency Dietary Supplement: cholecalciferol (vitamin D) Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Safety of Vitamin D Supplementation in the Elderly

Resource links provided by NLM:

Further study details as provided by Silvina Levis, MD, University of Miami:

Primary Outcome Measures:
  • Number of Participants Who Develop Hypercalcemia [ Time Frame: 6 months ]
    calcium serum levels measured at baseline and at the end of the intervention (6-months)

Secondary Outcome Measures:
  • Change From Baseline in Serum 25-hydroxyvitamin D Levels [ Time Frame: baseline and 6 months ]

Enrollment: 105
Study Start Date: April 2008
Study Completion Date: April 2009
Primary Completion Date: April 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
vitamin D (cholecalciferol) 400 IU daily orally - low dose
Dietary Supplement: cholecalciferol (vitamin D)
400 IU daily (low dose)
Active Comparator: 2
vitamin D (cholecalciferol) 2000 IU daily orally - high dose
Dietary Supplement: cholecalciferol (vitamin D)
2000 IU daily (high dose)

Detailed Description:

120 ambulatory men and women ages 65 to 95 will be enrolled in this study. Each subject will participate in the clinical trial for 6 months.

Parathyroid hormone, vitamin D, and serum and urinary calcium will be measured periodically. Physical performance will be tested at baseline and throughout the study.


Ages Eligible for Study:   65 Years to 95 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • ambulatory

Exclusion Criteria:

  • hypercalcemia
  • hypercalciuria > 4 mg/kg body weight/day
  • primary, secondary, or tertiary hyperparathyroidism
  • renal insufficiency (serum creatinine > 2 mg/dL )
  • history of nephrolithiasis
  • treatment with vitamin D (ergocalciferol, cholecalciferol, calcitriol)
  • treatment with anticonvulsants
  • Paget's disease
  • severe cardiac, pulmonary, hepatic, renal, or neurological disease
  • life expectancy < 1 year
  • participation in another trial
  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 identifier: NCT00681590

United States, Florida
University of Miami
Miami, Florida, United States, 33136
Sponsors and Collaborators
University of Miami
Merck Sharp & Dohme Corp.
Principal Investigator: Silvina Levis, MD University of Miami
  More Information

Additional Information:
Responsible Party: Silvina Levis, MD, Professor, University of Miami Identifier: NCT00681590     History of Changes
Other Study ID Numbers: 20070018
Study First Received: May 15, 2008
Results First Received: February 5, 2016
Last Updated: December 2, 2016

Keywords provided by Silvina Levis, MD, University of Miami:
vitamin D

Additional relevant MeSH terms:
Vitamin D Deficiency
Deficiency Diseases
Nutrition Disorders
Vitamin D
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents processed this record on September 19, 2017