Fimasartan (BR-A-657) is an orally active, highly potent angiotensin II receptor AT1 (AGTR1) antagonist (blocker) that selectively blocks AngII-, but not KCl- or noradrenaline-, induced contraction of rabbit thoracic aortic rings (IC50 = 0.42 nM) with 615-fold higher AT1 affinity than losartan (IC50 = 0.13 nM vs. 80 nM against 0.05 nM AngII for binding rat adrenal cortex). Fimasartan significantly decreases mean arterial blood pressure with rapid onset (in 0.5 h) in spontaneously hypertensive rats (Emax of 75% reduction, 5-24 hr post 10 mg/kg p.o.) and is ~19-fold more effective than losartan against AngII (100 ng/kg i.v.)-induced pressor response in rats in vivo (ED50 = 18 ng/kg vs. 336 ng/kg i.v.).
Orally active, highly potent angiotensin II receptor AT1 (AGTR1) antagonist with superior in vivo antihypertensive efficacy than Losartan.
Journal of cardiovascular pharmacology, 62(2), 229-236 (2013-04-26)
To evaluate the effect of the novel angiotensin receptor blocker Fimasartan on the development of atherosclerosis and plaque stabilization in an animal model. Twenty-four rabbits received an aortic balloon injury from 30 cm to a level just above the aortic
Expert opinion on drug metabolism & toxicology, 14(5), 533-541 (2018-04-21)
Fimasartan is the ninth and latest Angiotensin Receptor Blockers for the treatment of hypertension. Fimasartan is a derivative of losartan in which the imidazole ring has been replaced. It provides a selective type 1 angiotensin II receptor antagonist effect with
Journal of clinical pharmacology, 53(1), 75-81 (2013-02-13)
The authors studied the effects of ketoconazole and rifampicin on the pharmacokinetics of a single dose of fimasartan (BR-A-657), a newly developed angiotensin II receptor antagonist for the treatment of hypertension, in 22 healthy participants. Ketoconazole increased the maximumplasma concentration
