Ixabepilone is an epothilone B analog developed by Bristol-Myers Squibb as a cancer drug. It is produced by Sorangium cellulosum. It acts to stabilize microtubules. On October 16, 2007, the U.S. Food and Drug Administration approved ixabepilone for the treatment of aggressive metastatic or locally advanced breast cancer no longer responding to currently available chemotherapies.In November 2008, the EMEA has refused a marketing authorisation for Ixabepilone. Ixabepilone is administered through injection, and is marketed under the trade name Ixempra Ixabepilone, in combination with capecitabine, has demonstrated effectiveness in the treatment of metastatic or locally advanced breast cancer in patients after failure of an anthracycline and a taxane. It has been investigated for use in treatment of non-Hodgkin's lymphoma