The purpose of the present invention is to discover which compounds among the vast number of pyridylamino acetic acid compounds exhibit a markedly superior intraocular pressure-lowering action and can serve as an intraocular pressure-lowering agent or as a therapeutic or prophylactic agent against glaucoma or ocular hypertension, and to discover the manner of administration and/or dosage at which the discovered compounds will impart an effective therapeutic or prophylactic effect when administered to patients (primarily humans). Provided is a pharmaceutical preparation for lowering intraocular pressure or for preventing or treating glaucoma or ocular hypertension, said pharmaceutical preparation containing 0.0003-0.01 pcnt (w/v) of (6-{[4-(pyrazol-1-yl)benzyl](pyridin-3-ylsulfonyl)aminomethyl}pyridin-2-yl amino) isopropyl acetate or a salt thereof.
