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FimAsartaN proTeinuriA SusTaIned reduCtion in comparison with losartan in diabetic chronic kidney disease (FANTASTIC): study protocol for randomized controlled trial.

 Jang-Young Kim  ;  Jung-Woo Son  ;  Sungha Park  ;  Tea-Hyun Yoo  ;  Yong-Jin Kim  ;  Dong-Ryeol Ryu  ;  Ho Jun Chin 
 TRIALS, Vol.18 : 632, 2017 
Journal Title
Issue Date
Chronic kidney disease ; Diabetes mellitus ; Hypertension ; Proteinuria

Fimasartan is the ninth angiotensin receptor blocker to be developed. However, it has not yet been evaluated for reno-protective effects in hypertensive diabetic chronic kidney disease (CKD). The target blood pressure (BP) for hypertensive diabetic CKD is also a controversial topic. This trial was designed to assess the reno-protective effects of fimasartan compared to those of losartan as a primary outcome. This study also compares the two drugs with regard to cardiovascular and renal outcomes in accordance with target systolic BP (SBP) (as secondary outcomes).


This study is a prospective, phase III, randomized, double-blind, active-controlled, non-inferiority, four-parallel group, dose-titration, multicenter trial. We recruit patients with hypertensive diabetic CKD with overt proteinuria. Participants will be randomized into four groups (1:1:1:1): fimasartan standard SBP control (SBP < 140 mmHg); fimasartan strict SBP control (SBP < 130 mmHg); losartan standard SBP control; and losartan strict SBP control. After 24 weeks, all individuals are treated with fimasartan for an additional 120 weeks in an open-label design, maintaining their assigned SBP control groups as randomized. The primary endpoint is the rate of change in proteinuria, which is assessed using the spot urine albumin-creatinine ratio at 24 weeks. The secondary endpoints are the cardiovascular and renal outcomes at 144 weeks compared between the strict SBP and standard SBP control groups.


The FANTASTIC is a clinical study to provide: (1) the reno-protective effect of fimasartan; and (2) the target BP to reduce adverse outcomes in hypertensive diabetic CKD with overt proteinuria.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Park, Sung Ha(박성하) ORCID logo https://orcid.org/0000-0001-5362-478X
Yoo, Tae Hyun(유태현) ORCID logo https://orcid.org/0000-0002-9183-4507
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