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Life sciences · Phase 3 Trial
ClinicalTrials.gov · October 7, 2026
No summary has been generated for this record yet. What follows is drawn from its source metadata only.
Phase 3 Trial.
No findings were extractable from the material analysed.
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
The source did not state who this applies to in practice.
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This record has not been graded across any dimension yet. Treat the label above as provisional and read the source.
What is missing. This record has no bottom line, key findings, reported figures, evidence dimensions. That is a gap in the analysis, not a judgement about the study.
Registry record from ClinicalTrials.gov (NCT03529110). This is a study registration, not published results. Lead sponsor: Daiichi Sankyo. Recruitment status: COMPLETED. Phase: PHASE3. Study type: INTERVENTIONAL. Enrollment: 524 participants (ACTUAL). Conditions: Breast Cancer. Interventions: DRUG: Trastuzumab deruxtecan (T-DXd); DRUG: Ado-trastuzumab emtansine (T-DM1). Primary outcome measures: Progression-Free Survival (PFS) Based on Blinded Independent Central Review (BICR) in Participants With HER2-Positive, Unresectable and/or Metastatic Breast Cancer Previously Treated With Trastuzumab and Taxane , Up to 33 months (data cut-off). Brief summary: This study is designed to compare the anti-tumor activity as well as the safety and efficacy of DS-8201a versus T-DM1 in HER2-positive, unresectable and/or metastatic breast cancer subjects previously treated with trastuzumab and taxane.