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The Dose Response of Niacin ER/Lovastatin on Peak Walking Time (PWT) in Patients With Intermittent Claudication - TROPIC

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ClinicalTrials.gov Identifier: NCT00071266
Recruitment Status : Completed
First Posted : October 20, 2003
Last Update Posted : November 2, 2006
Information provided by:
Kos Pharmaceuticals

Brief Summary:

The purpose of this study is to compare the dose response and safety of Niacin ER/Lovastatin, Niaspan® and Lovastatin with each other, in subjects with leg pain caused by a narrowing of their leg arteries.

At least 870 subjects, with leg pain caused by a narrowing of their leg arteries will take part in this study.

Both Niaspan and lovastatin (Mevacor®) are approved by the United States Food and Drug Administration (FDA) to treat high cholesterol. Niacin ER/Lovastatin (Advicor®), a combination of these two drugs, is also approved by the FDA to treat high cholesterol. The use of Niacin ER/Lovastatin to treat narrowing of leg arteries and relieve "intermittent claudication" (leg pain caused by narrowing of the arteries in the leg) is considered investigational. An investigational use is one that is not approved by the FDA.

Condition or disease Intervention/treatment Phase
Intermittent Claudication Peripheral Vascular Disease Drug: Niacin Extended Release and Lovastatin Tablets Phase 3

Detailed Description:

This is a Phase 3, 32-week, double-blind, diet-intervention, randomized, parallel group, ten-arm, multi-center, multi-national, dose titration study evaluating the safety and efficacy of NL in patients with intermittent claudication (IC).

The objectives of this study are to evaluate the safety and efficacy of NL in patients with IC. The primary efficacy analysis will be the percent change from baseline in Peak Walking Time (PWT) calculated from the natural logarithm of the ratio of the time walked on treadmill at the Week 32 Visit divided by the time walked at baseline. Other efficacy measures will include Claudication Onset Time (COT) percent changes from baseline to Week 32 , changes in Ankle Brachial Index (ABI), Quality of Life (QoL) percent changes at Weeks 20 and 32, lower limb amputations, composite of cardiovascular events (MI, stroke, and vascular death), and coronary and peripheral artery revascularizations. Safety variables will include serum transaminases, routine chemistry parameters, hematology, and adverse events. Pharmacokinetic analyses will be conducted as well.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 870 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: The Dose Response of Niacin ER/Lovastatin on Peak Walking Time (PWT) in Patients With Intermittent Claudication - a Matrix Design
Study Start Date : October 2003

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Information from the National Library of Medicine

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Ages Eligible for Study:   40 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Men & women at least 40 years of age or older. Women must not be pregnant nor breast-feeding & not planning to become pregnant or to breast-feed.
  • History of IC of the lower extremities which has been present for at least 6 months with no change in symptoms in the previous 3 months prior to screening.
  • LDL-C of <160 mg/dL and Triglycerides <800.


  • Severe neuropathy.
  • Gross obesity (BMI ≥ 40).
  • Presence of critical limb ischemia defined as ischemic rest pain, gangrene, ulceration, or pending amputation of a lower extremity due to severe PAD.
  • Surgical intervention to alleviate symptoms of claudication within 6 months or endovascular interventions within 3 months.
  • Documented CAD taking any cholesterol-modifying agent and unable to undergo washout as judged by the Investigator or due to personal choice.
  • Systolic blood pressure ≥160 mmHg &/or diastolic blood pressure ≥95 mmHg.
  • Presence of clinically significant laboratory test abnormalities for liver or renal function tests, thyroid function or HgbA1C.
  • History of alcohol abuse or currently drinks alcohol in excess.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00071266

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Sponsors and Collaborators
Kos Pharmaceuticals
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ClinicalTrials.gov Identifier: NCT00071266    
Other Study ID Numbers: MA-03-010401
The TROPIC Study
First Posted: October 20, 2003    Key Record Dates
Last Update Posted: November 2, 2006
Last Verified: October 2006
Keywords provided by Kos Pharmaceuticals:
Intermittent Claudication
Peripheral Arterial Disease
Additional relevant MeSH terms:
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Vascular Diseases
Intermittent Claudication
Peripheral Vascular Diseases
Peripheral Arterial Disease
Cardiovascular Diseases
Arterial Occlusive Diseases
L 647318
Hypolipidemic Agents
Molecular Mechanisms of Pharmacological Action
Lipid Regulating Agents
Vasodilator Agents
Vitamin B Complex
Physiological Effects of Drugs
Anticholesteremic Agents
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Enzyme Inhibitors