EMA is updating the prescribing information for Tyverb (lapatinib) following detection of errors in results of a study involving postmenopausal women who had ‘HR+/HER2+’ breast cancer and whose disease had worsened despite previous treatment with trastuzumab. The results had indicated a benefit of Tyverb over trastuzumab when each medicine was used together with an aromatase inhibitor.
The detected errors were included in the prescribing information for Tyverb on 30 July 2018. However, these will now be removed while data are being re-analysed. In the meantime, the prescribing information will be amended to state, as before, that no data are available on the effectiveness of Tyverb compared with trastuzumab in this combination in patients previously treated with trastuzumab.
In the light of this new information, doctors currently treating patients with Tyverb in combination with an aromatase inhibitor, whose disease had worsened despite previous treatment with trastuzumab, should decide whether to continue with the same therapy or consider an alternative treatment.