Patent ID: 7569556

Claim:
A method for providing a topical timed release of a fluoroquinolone antibacterial agent for the eyeball of an animal in need thereof, the method comprising: (a) providing a composition comprising the fluoroquinolone antibacterial agent and a chemically modified polysaccharide (CMP) random copolymer, the CMP comprising (i) saccharide rings having C 2 and C 3 carbon positions and a bond therebetween, the saccharide rings being linked with (ii) ring-opened saccharide units at the bond between the C 2 and C 3 carbon positions, the ring-opened C 2 and C 3 carbon positions containing carboxylic acid moieties, water dispersible salts thereof, or combinations thereof; wherein the CMP is dispersed in water to form a clear solution as a time-release adjuvant for the fluoroquinolone antibacterial agent; and (b) topically providing the composition on the eyeball to provide the timed release.