Polymorphic mixture of rifaximin and its use for the preparation of solid formulations

  • US 10,961,257 B2
  • Filed: 09/12/2019
  • Issued: 03/30/2021
  • Est. Priority Date: 03/31/2014
  • Status: Active Grant
First Claim
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1. A Rifaximin polymorphic mixture of α



  • form in a relative ratio of 85/15±

    3, characterized by an X-Ray spectrum with characteristic 2theta values at;

    5.32, 5.78, 6.50, 7.24, 7.82, 8.80, 10.50, 11.02, 11.58, 13.08, 14.42, 17.32, 17.68, 18.58, 19.52, 21.04, 21.60, and 21.92.

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