Salt and crystalline forms thereof of a drug

A therapeutic composition comprising crystalline D-glucitol, 1-deoxy-1-(methylamino)-, 1-(6-amino-3,5-difluoropyridin-2-yl)-8-chloro-6-fluoro-1,4-dihydro-7-(3-hydroxyazetidin-1-yl)-4-oxo-3-quinolinecarboxylate salt and an excipient, wherein the therapeutic composition is in a dosage form selected from the group consisting of a capsule, a dragee, an emulsion, a granule, a pill, a powder, a solution, a suspension, a tablet, a microemulsion, an elixir, a syrup, a powder for reconstitution, a cream, a gel, an inhalant, a lotion, an ointment, a paste, a powder, an aqueous suspension, and an oleaginous suspension.