NCIt definition : A racemic mixture and selective beta-1 adrenergic receptor antagonist with antihypertensive
and anti-glaucoma activities and devoid of intrinsic sympathomimetic activity. Betaxolol
selectively and competitively binds to and blocks beta-1 adrenergic receptors in the
heart, thereby decreasing cardiac contractility and rate. This leads to a reduction
in cardiac output and lowers blood pressure. When applied topically in the eye, this
agent reduces aqueous humor secretion and lowers the intraocular pressure (IOP). In
addition, betaxolol prevents the release of renin, a hormone secreted by the kidneys
that causes constriction of blood vessels.;