1.1 Trastuzumab emtansine is not recommended, within its marketing authorisation, for treating adults with human epidermal growth factor 2 (HER2) positive, unresectable locally advanced or metastatic breast cancer previously treated with trastuzumab and a taxane.
1.2 People currently receiving treatment initiated within the NHS with trastuzumab emtansine that is not recommended for them by NICE in this guidance should be able to continue treatment until they and their NHS clinician consider it appropriate to stop.