Patent ID: 8835452

Claim:
A polymorph rifaximin preparation comprising a polymorph rifaximin in form α, β and/or γ wherein the polymorph rifaximin in form a has x-ray powder diffraction pattern peaks at about: 7.4°, 7.9°, and 11.8°; or 7.4°, 8.8°, and 11.8°; or 7.4°, 10.5°, and 11.8°; or 7.4°, 11.1°, and 11.8°; or 7.4°, 11.8°, and 12.9°; or 7.4°, 11.8°, and 17.6°; or 7.4°, 11.8°, and 19.7°; or 7.4°, 11.8°, and 21.4°; or 7.4°, 11.8°, and 22.1°, or 7.4°,11.1°, and 12.9°; or 7.4°, 11.1°, and 19.7°; or 7.4°, 12.9°, and 19.7°; or 11.1°, 11.8°, and 19.7°; or 11.1°, 19.7°, and 21.4°; or 11.1°, 19.7°, and 22.1°, or 11.8°, 12.9°, and 19.7°; or 11.8°, 19.9°, and 22.1°, 2θ. the polymorph rifaximin in form β has x-ray powder diffraction pattern peaks at about: 5.4°, 6.4°, and 7.0°, or 5.4°, 6.4°, and 7.8°; or 5.4°, 6.4°, and 9.0°; or 5.4°, 6.4°, and 10.4°; or 5.4°, 6.4°, and 13.1°, or 5.4°, 7.0°, and 14.4°; or 5.4° 10.4°, and 18.3°; or 5.4° 10.4°, and 20.9°; or 5.4° 10.4°, and 17.1°, or 6.4° 7.0°, and 10.4°; or 6.4° 7.8°, and 10.4°; or 6.4° 9.0°, and 10.4°; or 6.4° 10.4°, and 14.4°; or 10.4° 13.1°, and 14.4°; or 10.4° 17.1°, and 17.9°; or 10.4° 17.9°, and 18.3°; or 10.4° 17.9°, and 20.9°; or 10.4° 18.3°, and 20.9°; or 14.4° 17.1°, and 18.3°; or 17.1° 18.3°, and 20.9°; or 14.4° 17.1°, and 20.9°, 2θ; and the polymorph rifaximin in form γ as x-ray powder diffraction pattern peaks at about: 5.0°, 7.1°, and 8.4° 2θ.