A Randomized, Double-Blind, Placebo-Controlled, 3x3 Factorial Design, Phase II Study to Evaluate the Antihypertensive Efficacy and Safety of Combination of Fimasartan and Amlodipine in Patients With Essential Hypertension

Inclusion Criteria: 1. Subjects who agreed to participate in this study and submitted the written informed consent 2. Subjects aged 20 to 75 years 3. Essential hypertension subjects who are measured more 90mmHg, less than 114mmHg of sitting diastolic blood pressure (SiDBP) at baseline(day 0). 4. Subjects who considered to understand this study , be cooperative, and able to be followed-up whole of the study period. Exclusion Criteria: 1. Severe hypertension patients; more 115mmHg of SiDBP and/or more 185 mmHg of Sitting systolic blood pressure (SiSBP) 2. Patients with secondary hypertension 3. Patients with significant investigations - abnormal renal function (Creatinine more 1.5 times than upper limit of normal), abnormal liver function (AST, ALT more 2 times than upper normal), moderate fatty lever needed medication 4. Patients with significant investigations - Hypokalemia(Less than 3.5mmol/L), Hyperkalemia(exceeded 5.5mmol/L) 5. Patients with sodium ion or body fluid is depleted and not able to correct 6. Patients with hypotension who has sign and symptom 7. Patients with surgical and medical disease it is able to be affect to absorption, distribution, metabolism, excretion 8. Patients with severe insulin dependent or uncontrolled diabetes mellitus (HbA1c \> 9%, regimen change of oral hypoglycemic agent, using insulin) 9. Patients with severe heart disease, ischemic heart disease within 6months, peripheral vascular disease, Percutaneous Transluminal Coronary Angiography (PTCA), Coronary Artery Bypass Graft (CABG) 10. Patients with significant ventricular tachycardia, atrial fibrillation, atrial flutter or other significant arrhythmia 11. Patients with hypertrophic obstructive cardiomyopathy, severe obstructive coronary artery disease, aortic stenosis, hemodynamically significant aortic valve or mitral valve disease 12. Patients with severe cerebrovascular disease 13. Patients with wasting disease, autoimmune disease, connective tissue disease at present and/or previous. 14. Patients with known severe or malignancy retinopathy 15. Patients with hepatitis B or C or HIV positive reaction 16. Patients who have a story or evidence of alcohol or drug abuse within 2years 17. Patients who are measured the mean difference of mean blood pressure of both arm under SiDBP 10mmHg or SiSBP 20mmHg at screening and baseline visit 18. Patients with history of allergic reaction to any angiotensin II antagonist 19. Patients with any chronic inflammation disease needed to chronic inflammation therapy 20. Patients with the medical histories of malignant tumor within 5years, except local basal cell carcinoma of the skin 21. Childbearing and breast-feeding women 22. Female who plan to become pregnancy or have a possibility of pregnancy but don't prevent conception with acknowledged methods 23. Patients who took medicine within 12 weeks from screening visit or is going on the progress of other clinical trial 24. Subject who are judged unsuitable to participate in this study by investigator