Aqueous intraocular penetration-promoting eye drop
An aqueous eye drop comprising 2-amino-3-(4-bromobenzoyl)phenylacetic acid or its pharmacologically acceptable salt or a hydrate thereof and an organic amine (for example, aminoethylsulfonic acid or trometamol) or a salt thereof is useful as an eye drop for once a day administration for treating inflammatory diseases of the external segment or the anterior segment of the eyes, since such aqueous eye drop can maintain a therapeutically effective concentration of 2-amino-3-(4-bromobenzoyl)phenylacetic acid in anterior aqueous humor for at least 24 hours by once a day administration.
1. A method for promoting intraocular penetration of 2-amino-3-(4-bromobenzoyl)phenylacetic acid or its pharmacologically acceptable salt or a hydrate thereof, which comprises administering an aqueous eye drop comprising 2-amino-3-(4-bromobenzoyl)phenylacetic acid or its pharmacologically acceptable salt or a hydrate thereof and an organic amine selected from the group consisting of aminoethylsulfonic acid and aminomethylsulfonic acid or a salt thereof, wherein the content of the organic amine or salt thereof is an amount to allow the octanol-water partition coefficient of 2-amino-3-(4-bromobenzoyl)phenylacetic acid to be 0.7 to 4.
2. The method according to claim 1 , wherein the concentration of 2-amino-3-(4-bromobenzoyl)phenylacetic acid or its pharmacologically acceptable salt or a hydrate thereof in the aqueous eye drop is 0.01 to 0.5w/v %.
3. The method according to claim 1 , wherein the organic amine or salt thereof has a concentration of 0.05 to 5w/v %.
4. The method according to claim 1 , wherein the organic amine is aminoethylsulfonic acid.