Effects of Vytorin Versus Placebo in Subjects With Primary Hypercholesterolemia (Study P04420)

A Multicenter, Double-blind, Randomized, Placebo-controlled Parallel Groups Study Comparing the Efficacy and Safety of Vytorin Versus Placebo in Subjects With Primary Hypercholesterolemia

This is a multicenter, randomized, double-blind, placebo-controlled, parallel-group Phase 3 study of Vytorin 10/10 (ezetimibe 10 mg with simvastatin 10 mg), Vytorin 10/20 (ezetimibe 10 mg with simvastatin 20 mg), and Vytorin 10/40 (ezetimibe 10 mg with simvastatin 40 mg) compared to placebo administered daily for 8 consecutive weeks in subjects with primary hypercholesterolemia (LDL-C >3.64 mmol/L [140 mg/dL]). The efficacy of daily Vytorin versus placebo in reducing the concentration of LDL-C will be evaluated, and the efficacy of daily Vytorin versus placebo with respect to change in the concentrations of total cholesterol, triglycerides, and HDL-C will be compared. The safety of Vytorin versus placebo will also be assessed.

Study Overview

• Status: Completed
• Conditions: Hypercholesterolemia
• Intervention / Treatment: Drug: ezetimibe with simvastatin; Drug: Ezetimibe with Simvastatin; Drug: Ezetimibe with Simvastatin; Drug: Placebo

• Study Type: Interventional
• Enrollment (Actual): 392
• Phase: Phase 3

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 75 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Subjects must be >=18 years and <=75 years of age, male or female.
• Primary hypercholesterolemic subject with a plasma LDL cholesterol concentration >3.64 mmol/L (140 mg/dL) to <=6.3 mmol/L (250 mg/dL) using the Friedewald calculation; total cholesterol (TC) >5.2 mmol/L (200 mg/dL) to <12.7 mmol/L (500 mg/dL) and triglyceride concentrations of <=3.99 mmol/L (350 mg/dL) should be met at the same time. At the time of recruitment (Visit 1), these values may be lower if the subject is on lipid-lowering therapy. (ie, prior to the start of lipid lowering drug washout) or may be higher at the start of dietary therapy.
• Liver transaminases (ALT, AST) <=50% above the upper limit of normal, with no active liver disease and CK <=50% above the upper limit of normal.
• Clinical laboratory tests (complete blood count [CBC], blood chemistries, urinalysis) must be within normal limits, or clinically acceptable to the investigator/sponsor.
• Women of childbearing potential (includes women who are less than 1 year postmenopausal and women who become sexually active) must be using an acceptable method of birth control.
• Subjects must be free of any clinically significant diseases other than hyperlipidemia that would interfere with study evaluations.
• Subjects must understand and be able to adhere to the dosing and visit schedules.
• Subject must agree to remain on a cholesterol-lowering diet for the duration of the study (according to China Adult Treatment Panel of High Blood Cholesterol).

Exclusion Criteria:

• Subjects whose body mass index (BMI=weight [kg]/height2 [m]) is >=30 kg/m2 at Visit 3 (Baseline Visit).
• Subjects who have known hypersensitivity to HMG CoA reductase inhibitors.
• Subjects who consume >14 alcoholic drinks per week. (A drink is: a can of beer, glass of wine, or single measure of spirits).
• Any condition or situation, which in the opinion of the investigator, might pose a risk to the subject or interfere with participation in the study.
• Women who are pregnant or nursing.
• Subjects who have not observed the designated washout periods for any of the prohibited medications.
• Congestive heart failure defined by NYHA as Class III or IV.
• Uncontrolled cardiac arrhythmia.
• Myocardial infarction, coronary bypass surgery, or angioplasty within 6 months of study entry.
• Unstable or severe peripheral artery disease within 3 months of study entry.
• Unstable angina pectoris within 6 months of study entry.
• Uncontrolled hypertension (treated or untreated) with systolic blood pressure >160 mm Hg or diastolic >100 mm Hg at study entry.
• Uncontrolled (as determined by fasting glucose >180 mg/mL or HbA1c >9%) or newly diagnosed (within 1 month of study entry) diabetes mellitus.
• Uncontrolled endocrine or metabolic disease known to influence serum lipids or lipoproteins, ie, secondary causes of hyperlipidemia, such as secondary hypercholesterolemia due to hypothyroidism (thyroid stimulating hormone [TSH] above upper limit of normal). Subjects with a history of hypothyroidism who are on a stable therapy of thyroid hormone replacement for at least 6 weeks are eligible for enrollment if TSH levels are within normal limits before enrollment.
• Known impaired renal function (plasma creatinine >2.0 mg/dL), or nephrotic syndrome at study entry.
• Disorders of the hematologic, digestive, or central nervous systems, including cerebrovascular disease and degenerative disease that would limit study evaluation or participation.
• Known HIV positive.
• Cancer within the past 5 years (except for successfully treated basal and squamous cell carcinomas).
• History of mental instability, drug/alcohol abuse within the past 5 years, or major psychiatric illness not adequately controlled and stable on pharmacotherapy.
• Female subject receiving hormonal therapy, including hormone replacement, any estrogen antagonist/agonist, or oral contraceptives.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo	Drug: Placebo; Placebo once daily for a total of eight weeks
Experimental: Vytorin 10/10; Ezetimibe 10 mg with Simvastatin 10 mg	Drug: ezetimibe with simvastatin; Ezetimibe 10 mg with Simvastatin 10 mg once daily for a total of eight weeks
Experimental: Vytorin 10/20; Ezetimibe 10 mg with Simvastatin 20 mg	Drug: Ezetimibe with Simvastatin; Ezetimibe 10 mg with Simvastatin 20 mg once daily for a total of eight weeks; Drug: Ezetimibe with Simvastatin; Ezetimibe 10 mg with Simvastatin 40 mg once daily for a total of eight weeks
Experimental: Vytorin 10/40; Ezetimibe 10 mg with Simvastatin 40 mg	Drug: Ezetimibe with Simvastatin; Ezetimibe 10 mg with Simvastatin 20 mg once daily for a total of eight weeks; Drug: Ezetimibe with Simvastatin; Ezetimibe 10 mg with Simvastatin 40 mg once daily for a total of eight weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Percent Change in Low-density Lipoprotein Cholesterol (LDL-C) From Baseline to Endpoint After 8 Weeks of Treatment	Baseline, 8 weeks

Collaborators and Investigators

• Sponsor: Organon and Co
• Collaborators: Merck Sharp & Dohme LLC; Schering-Plough

Study record dates

Study Major Dates

• Study Start: April 1, 2006
• Primary Completion (Actual): November 1, 2006
• Study Completion (Actual): November 1, 2006

Study Registration Dates

• First Submitted: December 19, 2006
• First Submitted That Met QC Criteria: December 19, 2006
• First Posted (Estimate): December 20, 2006

Study Record Updates

• Last Update Posted (Actual): February 9, 2022
• Last Update Submitted That Met QC Criteria: February 7, 2022
• Last Verified: February 1, 2022

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Metabolic Diseases; Lipid Metabolism Disorders; Hyperlipidemias; Dyslipidemias; Hypercholesterolemia; Molecular Mechanisms of Pharmacological Action; Enzyme Inhibitors; Antimetabolites; Anticholesteremic Agents; Hypolipidemic Agents; Lipid Regulating Agents; Hydroxymethylglutaryl-CoA Reductase Inhibitors; Simvastatin; Ezetimibe
• Other Study ID Numbers: P04420; SCH 465981