- Levobetaxolol (Betaxon) and other beta-adrenergic antagonists: preclinical pharmacology, IOP-lowering activity and sites of action in human eyes. Sharif, N.A., Xu, S.X., Crider, J.Y., McLaughlin, M., Davis, T.L. Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics. (2001)