• Percentage of subjects with LDL-C less than 70 mg/dL at 90 days(±14 days) [ Time Frame: Baseline, Visit 4(Day 90) ]
  Percentage of subjects with LDL-C less than 70 mg/dL at 90 days(±14 days)
• The percentage of subjects with LDL-C decreased more than or less than 70 mg/dL at 90 days(±14 days) [ Time Frame: Baseline, Visit 4(Day 90) ]
  The percentage of subjects with LDL-C decreased more than or less than 70 mg/dL at 90 days(±14 days)
• The decrement of LDL-C at 90 days (±14 days) compared to baseline LDL-C (absolute difference and change) [ Time Frame: Baseline, Visit 4(Day 90) ]
  The decrement of LDL-C at 90 days (±14 days) compared to baseline LDL-C (absolute difference and change)
• The percentage of subjects achieved multiple lipid level (Total-C < 200mg/dL, LDL-C < 70mg/dL and triglyceride < 150mg /dL) [ Time Frame: Baseline, Visit 4(Day 90) ]
  The percentage of subjects achieved multiple lipid level (Total-C < 200mg/dL, LDL-C < 70mg/dL and triglyceride < 150mg /dL)
• Cardiovascular event rates including stroke (ischemic or hemorrhagic), coronary artery(myocardial infarction or coronary vascular reperfusion) and death related to vascular disease. [ Time Frame: Baseline to Visit 4(up to 90 days) ]
  Cardiovascular event rates including stroke (ischemic of hemorrhagic), coronary artery(myocardial infarction or coronary vascular reperfusion) and death related to vascular disease.
• Number of Death of all causes. [ Time Frame: Baseline to Visit 4(up to 90 days) ]
  Number of Death of all causes.
• Number of subjects with newly diagnosed diabetes. [ Time Frame: Visit 4(Day 90) ]
  Number of subjects with newly diagnosed diabetes.
• Fatigue scale measured by Fatigue Severity Scale. [ Time Frame: Screening, Visit 4(Day 90) ]
  Fatigue scale measured by Fatigue Severity Scale. (The Fatigue Severity Scale is a 9-item scale which measures the severity of fatigue and its effect on a person's activity and lifestyle in patients with a variety of disorders. A 9-item questionnaire with questions related to how fatigue interferes with certain activities and rates its severity. The Fatigue Severity Scale scores range from 9 to 63, with higher scores indicating a greater fatigue severity.)
• Incidence of rhabdomyolysis [ Time Frame: Baseline to Visit 4(up to 90 days) ]
  Incidence of rhabdomyolysis
• Incidence of serious liver dysfunction [ Time Frame: Baseline to Visit 4(up to 90 days) ]
  Incidence of serious liver dysfunction (AST or ALT increase more than three times from baseline)

The purpose of this study is to compare the efficiency and safety on the target LDL-C goal achievement between rosuvastatin 10 mg plus ezetimibe 10 mg (rosuvastatin/ezetimibe 10/10 mg) once daily versus rosuvastatin 20 mg once daily in patients with recent ischemic stroke.

The target LDL-C goal achievement rate in patients with recent ischemic stroke has not been well studied. In particular, no clinical studies have been conducted comparing the efficacy and safety of low-dose rosuvastatin plus ezetimibe with high-dose rosuvastatin single agent for achieving target LDL-C levels.

In this trial, the investigators aim to compare the efficacy of the target LDL-C achievement between rosuvastatin 10 mg plus ezetimibe 10 mg (rosuvastatin/ezetimibe 10/10 mg) and rosuvastatin 20 mg in patients with recent ischemic stroke.

For this trial, more than 292 patients (584 total) per group will be enrolled.

Subjects who were satisfied with the inclusion/exclusion criteria of this trial and who agreed to participate in the clinical trial in writing were randomly assigned to a 1:1 ratio in the experimental group (the low-dose combination of rosuvastatin plus ezetimibe) and comparator group (high-dose rosuvastatin).

The duration of administration of the drug for clinical trials is 90 days (±14 days), and the efficacy and safety evaluation parameters are compared with baseline.

• Drug: Experimental: Rosuvastatin/Ezetimibe 10
  • Rosuvastatin/Ezetimibe 10/10mg
  • orally administered once daily for 90 days
  Other Name: Rosuzet tab 10/10 mg
• Drug: Active Comparator: Rosuvastatin 20mg
  • Rosuvastatin 20mg
  • orally administered once daily for 90 days
  Other Name: Suvast tab 20mg

• Experimental: Rosuvastatin/Ezetimibe 10/10mg
  The experimental group is orally administered with rosuvastatin 10 mg plus ezetimibe 10 mg combination once daily for 90 days.
  Intervention: Drug: Experimental: Rosuvastatin/Ezetimibe 10
• Active Comparator: Rosuvastatin 20mg
  The comparator group is orally administered with rosuvastatin 20 mg single agent once daily for 90 days
  Intervention: Drug: Active Comparator: Rosuvastatin 20mg

Inclusion Criteria:

1. Patients with recent ischemic stroke who meet both 1) and 2) criteria below. 1) Patients with acute ischemic stroke confirmed by DWI(diffusion-weighted imaging)

   This is satisfied by meeting at least one of the following two criteria:

   1. Patients who sustained stroke symptoms for more than 24 hours and had acute ischemic lesions on DWI.

   2. Patients with acute ischemic lesions in DWI who had improved symptoms within 24 hours.

      2) Patients with ischemic stroke within 90 days.

2. Statin therapy indicated according to the recommendations of the 2014 American Heart Association/American Stroke Association guidelines.

   This is accomplished by meeting at least one of the following three criteria:

   1. Patients with ischemic stroke due to arteriosclerosis and LDL-C ≥ 100 mg / dL. (Class I; Level of Evidence B)
   2. Patients with ischemic stroke due to arteriosclerosis and LDL-C <100 mg / dL. (Class I; Level of Evidence C)
   3. Patients who require statin therapy due to other associated atherosclerotic cardiovascular disease. (Class I; Level of Evidence A).
3. Patients without statin dose within 28 days before ischemic stroke.

4. Patients who measured baseline LDL-C levels after an ischemic stroke. This is satisfied by meeting at least one of the following two criteria:

   1. Patients who had a baseline LDL-C level before the onset of a recent ischemic stroke and started statin therapy.

   2. Patients hospitalized with acute ischemic stroke who had baseline LDL-C levels after initiation of statin therapy should meet both of the following conditions:

      1. Patients with LDL-C levels measured within 3 days after initiation of statin therapy
      2. Patients in whom randomization and administration of the study drug can be administered within 7 days after baseline LDL-C measurement.
5. Adults over 19 years.
6. Those who voluntarily agreed in writing to the trial.

Exclusion Criteria:

1. Planned vascular intervention before the end of trial
2. Significant hepatic dysfunction (Aspartate Aminotransferase or Alanine Aminotransferase >120 IU/L)
3. Allergy or contraindication to rosuvastatin or ezetimibe
4. Alcohol or drug addiction
5. Pregnancy or breast-feeding
6. Severe anemia: Hb level <10 g/dL for men and <9 g/dL for women
7. Bleeding diathesis: platelet count <100,000/μl or prothrombin time International Normalized Ratio > 1·7
8. Inability or unwillingness to comply with study-related procedures
9. Employees of the investigator or study center, with direct involvement in the current study
10. Women unwilling to continue contraception during the study period
11. Participation in other clinical trials within three-month
12. Malignancy or other serious medical conditions with a life expectancy <6 months
13. Treatment with protease inhibitors or cyclosporine
14. Patients with severe renal impairment (creatinine clearance <30 mL / min)
15. Other reasons for ineligibility judged by investigators

• Ewha Womans University
• Severance Hospital
• Korea University
• Korea University Guro Hospital
• Myongji Hospital
• Seoul St. Mary's Hospital
• Samsung Medical Center
• Seoul National University Hospital
• Chung-Ang University Hosptial, Chung-Ang University College of Medicine
• Hallym University Medical Center
• Kyunghee University Medical Center
• Inje University