Patent ID: 7709022

Claim:
Orally administrable preparation comprising ciprofloxacin as an active compound, characterized in that it contains a mixture of a) gel-forming polymer which is a cellulose ether of a viscosity of 5 to 400 cP, measured as 2% polymer concentration by weight aqueous solution at 20° C., and b) a mixture of a salt with the free base of ciprofloxacin at a salt-to-free base weight ratio of from about 1.3:1 to about 1.8:1; wherein the preparation releases 80% of the active compound both in 0.1 N hydrochloric acid and in acetate buffer at pH 4.5 in the USP XXIV paddle test at 50 revolutions per minute / 37° C. in the course of 1 to 4 hours.