Sioux Pharm Inc. – Withdrawal of Claims and Retraction of Allegations Against Summit Nutritionals International, Inc. ® Oct 10, 2015 | Press Releases Sioux Pharm, Inc. and Sioux Biochemical, Inc. hereby withdraw all claims made against Summit Nutritionals International, Inc. . Sioux Pharm, Inc. and Sioux Biochemical, Inc. hereby withdraw all claims made against Summit Nutritionals International, Inc. . Official Iowa Court Documents