Enhertu approved fully by FDA for patients with HER2-positive metastatic breast cancer treated with a prior anti-HER2-based regimen.
AstraZeneca and Daiichi Sankyo’s Enhertu (trastuzumab deruxtecan) has been approved in the US for the treatment of adult patients with unresectable or metastatic HER2-positive breast cancer who have received a prior anti-HER2-based regimen either in the metastatic setting, or in the neoadjuvant or adjuvant setting and have developed disease recurrence during or within six months of completing therapy.
Enhertu is a specifically engineered HER2-directed antibody drug conjugate (ADC) being jointly developed and commercialised by AstraZeneca and Daiichi Sankyo.
The approval by the FDA was based on positive results from the DESTINY-Breast03 Phase III trial that showed Enhertu reduced the risk of disease progression or death by 72% versus trastuzumab emtansine (T-DM1) (hazard ratio [HR] 0.28; 95% confidence interval [CI]: 0.22-0.37; p<0.0001) in patients with her2-positive unresectable and or metastatic breast cancer previously treated with trastuzumab and a taxane.
The approval was granted under the FDA’s Real-Time Oncology Review (RTOR) programme and converts the accelerated approval of Enhertu in later line HER2-positive metastatic breast cancer to standard approval, broadening Enhertu’s breast cancer indication in the US to earlier lines of use in patients with HER2-positive metastatic breast cancer.