A pharmaceutical composition comprising: (a)
bendamustine; (b) sulfobutyl
ether beta-
cyclodextrin ("SBECD"); (c) optionally,
sodium chloride; and (d) aqueous
diluent; characterized in that the SBECD concentration is between 40% and 60% (w / w) based upon the combined weight of the SBECD and aqueous
diluent. In addition, a kit comprising (a) a
vial of such liquid pharmaceutical composition and (b) a stabilizing agent; as well as a method of treating a
cancer patient comprising administering to such patient an effective
dose of such pharmaceutical composition.