NCIt definition : The hydrochloride salt form of levobetaxolol, the S-isomer of the -selective beta-1
adrenergic receptor antagonist betaxolol with anti-glaucoma activity and devoid of
intrinsic sympathomimetic activity. When applied topically in the eye, levobetaxolol
reduces aqueous humor secretion and lowers the intraocular pressure (IOP).;