FIELD: chemistry.
SUBSTANCE: present invention relates to a new polymorph of Rifaximin, designated κ, in a new crystalline form and to a process for the preparation thereof. Under certain aspects, the invention also relates to pharmaceutical compositions comprising an effective amount of the polymorphic form κ of Rifaximin and a pharmaceutically acceptable carrier.
EFFECT: treatment of gastrointestinal conditions.
13 cl, 14 dwg, 3 tbl, 15 ex
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