CI

At a glance

ClinicalIndex Comparison Record
Phase 3Active· 524 enrolled
Drug / intervention
Trastuzumab deruxtecan (T-DXd) +1 moredrug
Likely dose
Trastuzumab deruxtecan (T-DXd) 100 mgfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT03529110
NCT03529110Phase 3Active

A Phase 3, Multicenter, Randomized, Open-Label, Active-Controlled Study of DS-8201a (Trastuzumab Deruxtecan), an Anti-HER2 Antibody Drug Conjugate (ADC), Versus Ado Trastuzumab Emtansine (T-DM1) for HER2-Positive, Unresectable and/or Metastatic Breast Cancer Subjects Previously Treated With Trastuzumab and Taxane

Daiichi Sankyo·interventional·Posted May 18, 2018·Updated Oct 21, 2025

In Brief

A Phase 3 clinical trial evaluating Trastuzumab deruxtecan (T-DXd) and Ado-trastuzumab emtansine (T-DM1) for Breast Cancer. Active but no longer recruiting, targeting 524 participants across 164 sites in 15 countries.

Detailed 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.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsBreast Cancer
CountriesAustralia, Belgium, Brazil, Canada, China, France, Germany, Hong Kong, Italy, Japan, South Korea, Spain, Taiwan, United Kingdom, United States

Timeline

Phase 3Active
20192020202120222023202420252026
First PostedMay 18, 2018
Enrollment StartAug 9, 2018
Primary CompletionMay 21, 2021
Study CompletionJul 30, 2026
TodayJul 2, 2026
Enrollment to primary: 2.8 yearsPosted 8.1 years ago

Interventions

Trastuzumab deruxtecan (T-DXd)drug

T-DXd is sterile lyophilized powder reconstituted into a sterile aqueous solution (100 mg/5 mL) to be administered intravenously.

Ado-trastuzumab emtansine (T-DM1)drug

The treatment will be in accordance with the approved label.