| Description: |
Eprosartan is a nonpeptide angiotensin II receptor antagonist with IC50 of 9.2 and 3.9 nM in rat and human adrenal cortical membranes, respectively.in vitro: Eprosartan mesylate, is one of the highly selective, orally active, non-peptide angiotensin-II-receptor antagonists. In rat and human adrenal cortical membranes, Eprosartan displaced specifically bound [125I]AII with IC50 of 9.2 and 3.9 nM, respectively. Eprosartan also inhibited [125I]AII binding to human liver membranes (IC50 = 1.7 nM) and to rat mesenteric artery membranes (IC50 = 1.5 nM). In rabbit aortic smooth muscle cells, Eprosartan caused a concentration-dependent inhibition of AII-induced increases in intracellular Ca++ levels. In rabbit aortic rings.
in vivo: Administration of Eprosartan (3-10 mg/kg) intraduodenally or intragastrically to conscious normotensive rats resulted in a dose-dependent inhibition of the pressor response to AII (250 ng/kg, i.v.). At 10 mg/kg, i.d., significant inhibition of the pressor response to AII was observed for 3 hr. In this same rat model, Eprosartan had no effect on base-line pressure or on the pressor response to norepinephrine or vasopressin. Eprosartan is highly effective and safe in lowering blood pressure, notably SBP, in older subjects with mild to moderate hypertension. Treatment with eprosartan in once-daily doses up to 1200 mg alone or in combination with HCTZ was well tolerated, with dizziness and asthenia being the most common side effects. Therapy with eprosartan mesilat was associated with significant hypotensive effect (more evident in patients with high systolic blood pressure), improvement in 24-hour blood pressure profile and quality of life, and lower probability of secondary stroke. Side effects were not observed. |
