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Comparison of Efficacy and Safety of Ezetimibe or Statin Monotherapy to Co-Administration of Both

This study has been completed.
Merck Sharp & Dohme Corp.
Donald W. Reynolds Foundation
Information provided by:
University of Texas Southwestern Medical Center Identifier:
First received: April 17, 2007
Last updated: NA
Last verified: April 2007
History: No changes posted
The purpose of this study is to compare the percent change in LDL cholesterol induced by ezetimibe or simvastatin monotherapy and by co-administration of both agents in Black, White and Hispanic men. Ezetimibe is a drug that blocks sterol absorption and simvastatin blocks hepatic cholesterol biosynthesis. The hypothesis to be tested is that Blacks are likely to be more responsive to LDL lowering by ezetimibe than statins because Blacks have a low production of cholesterol.

Condition Intervention
Cholesterol, LDL
Drug: Ezetimibe and Simvastatin

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Genetic Determinanats of Cardiovascular Risk Factors: Comparison of Efficacy and Safety of Ezetimibe or Statin Monotherapy to Co-Administration of Both

Resource links provided by NLM:

Further study details as provided by University of Texas Southwestern Medical Center:

Primary Outcome Measures:
  • The primary endpoints of the study will be the percent change in plasma LDL-C concentrations in response to each agent.
  • The treatment effect for each individual will be the percent reduction achieved with each agent.

Estimated Enrollment: 240
Study Start Date: February 2005
Study Completion Date: April 2007
  Show Detailed Description


Ages Eligible for Study:   20 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Black, white and hispanic males between the ages of 20 to 70 years
  • In good general health
  • Having a body mass index (BMI) between 20 and 35 kg/m2
  • Plasma LDL-C concentrations greater than or equal to 130 mg/dl but less than or equal to 175 mg/dL
  • TG (triglyceride) levels less than or equal to 250 mg/dL.

Exclusion Criteria:

  • Any condition that would be likely to render the individual unable to complete the study
  • Hypersensitivity to HMG-CoA reductase inhibitors
  • Poor mental function, drug or substance abuse, or unstable psychiatric illnesses that may interfere with optimal participation in the study
  • Treatment with another investigational drug within 30 days prior to Visit 1
  • Alcohol consumption >14 drinks per week
  • Phytosterol/phytostanol-containing products including margarines within 2 weeks
  • History of CHD, peripheral vascular disease, cerebrovascular disease, CHF, or uncontrolled arrhythmias
  • Creatinine >1.5 mg/dL, nephrotic syndrome, or other renal disease
  • Fasting plasma glucose (FPG) >126 mg/dL or history of diabetes
  • Abnormal TSH
  • Uncontrolled hypertension (systolic BP >160 mm Hg and/or diastolic BP >100 mm Hg)
  • Known active liver diseases or elevated serum transaminases (ALT and AST >1.5 times the upper limit of normal)
  • Digestive disorders or any abdominal surgery within the past 6 months
  • Cancer within the past 5 years (except for skin cancer)
  • HIV, HBV, or HCV positive
  • Lipid-lowering agents: bile-acid binding resins, HMG-CoA reductase inhibitors, ezetimibe, niacin (>200 mg/day), cholestin, fish oil, and fibrates, or cholesterol absorption inhibitors (e.g., neomycin) taken within 8 weeks prior to Visit 1
  • Medications that are potent inhibitors of CYP3A4 (cyclosporine, systemic itraconazole or ketoconazole, erythromycin or clarithromycin, nefazodone, verapamil, amiodarone, and protease inhibitors)
  • Anti-obesity medications: orlistat or sibutramine taken within 8 weeks prior to Visit 1
  • Systemic corticosteroids.
  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: NCT00461968

United States, Texas
UT Southwestern Medical Center at Dallas
Dallas, Texas, United States, 75390
Sponsors and Collaborators
University of Texas Southwestern Medical Center
Merck Sharp & Dohme Corp.
Donald W. Reynolds Foundation
Principal Investigator: Helen H Hobbs, MD UT Southwestern Medical Center
  More Information Identifier: NCT00461968     History of Changes
Other Study ID Numbers: 072004-28
Study First Received: April 17, 2007
Last Updated: April 17, 2007

Keywords provided by University of Texas Southwestern Medical Center:

Additional relevant MeSH terms:
Anticholesteremic Agents
Hypolipidemic Agents
Molecular Mechanisms of Pharmacological Action
Lipid Regulating Agents
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Enzyme Inhibitors processed this record on April 26, 2017