Inclusion Criteria:

• Patient with stable symptoms of intermittent claudication of the lower extremities, secondary to chronic occlusive arterial disease from atherosclerosis etiology (symptoms present for 6 months or longer and not significantly changed within the past 3 months)
• Initial claudication distance of 30 to 250 meters at screening constant workload treadmill test
• Confirmation of underlying Peripheral Arterial Disease (PAD) at screening
• Confirmation of symptom stability at randomization based on constant workload treadmill test performance
• The patient must have optimal cardiovascular risk prevention and appropriate management of PAD, including clopidogrel at the dose of 75mg per day, during the study period

Exclusion Criteria:

• Patient participated in investigational clinical trials in the last month prior to screening
• Pregnant or breast-feeding woman or woman without documented double birth control measures for at least 3 months prior to randomization
• Symptoms of PAD before the age of 40 years
• Recent initiations or discontinuation of treatment by vasoactive agents (e.g., pentoxifylline, berprost sodium, papverine, isoxsuprine, nylidrin, cyclandelate, and niacin derivatives). Patients treated by cilostazol within 3 months prior to screening will also be excluded
• Recent lower-extremity surgical or endovascular arterial reconstructions or sympathectomy, or recent deep venous thrombosis
• Recent occurrence of at least one of the following: acute myocardial infarction, unstable angina, coronary artery bypass graft, percutaenous coronary intervention, transient ischemic attack or stroke

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.