• An analogue of ethoxzolamide, 6-hydroxyethoxzolamide, was synthesized to enhance corneal permeability yet retain carbonic anhydrase inhibitory activity for use in lowering intraocular pressure. In a 1% suspension, the analogue caused a small but statistically significant unilateral reduction of IOP when applied to one eye of normal rabbits. When formulated in a gel vehicle, 6-hydroxyethoxzolamide caused a more prolonged and larger reduction in IOP in normal and ocular hypertensive rabbits compared with its effect in suspension or with the parent compound.
Lewis RA, Schoenwald RD, Eller MG, Barfknecht CF, Phelps CD. Ethoxzolamide Analogue Gel: A Topical Carbonic Anhydrase Inhibitor. Arch Ophthalmol. 1984;102(12):1821–1824. doi:10.1001/archopht.1984.01040031479027
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