Safety of Vitamin D in the Elderly

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: September 9, 2015
Last verified: September 2015

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
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, 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 University of Miami:

Primary Outcome Measures:
  • To establish the safety of a daily intake of vitamin D (cholecalciferol) of 2000 IU over 6 months in men and women ages 65 to 95 years. [ Time Frame: 6 months ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • To determine the efficacy of vitamin D (cholecalciferol) supplementation in improving measures of physical performance. [ Time Frame: 6 months ] [ Designated as safety issue: No ]

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
Dietary Supplement: cholecalciferol (vitamin D)
400 IU daily
Active Comparator: 2
vitamin D (cholecalciferol) 2000 IU
Dietary Supplement: cholecalciferol (vitamin D)
2000 IU daily

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
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • ambulatory

Exclusion Criteria:

  • hypercalcemia
  • hypercalciuria > 4 mg/kg body weight/day
  • primary, secondary, or tertiaryhyperparathyroidism
  • renal insufficiency (serum creatinine > 2 mg/dL )
  • history of nephrolithiasis
  • treatment with vitamin D (ergocalciferol, cholecalciferol, caltitriol)
  • 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

No publications provided by University of Miami

Additional publications automatically indexed to this study by Identifier (NCT Number):
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
Last Updated: September 9, 2015
Health Authority: United States: Institutional Review Board

Keywords provided by University of Miami:
vitamin D

Additional relevant MeSH terms:
Vitamin D Deficiency
Deficiency Diseases
Nutrition Disorders
Vitamin D
Bone Density Conservation Agents
Growth Substances
Pharmacologic Actions
Physiological Effects of Drugs processed this record on October 09, 2015