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Table 1 Summary of clinical studies evaluating tucatinib or its combination with other agents in HER2+ metastatic breast cancer patients

From: The efficacy of tucatinib-based therapeutic approaches for HER2-positive breast cancer

Treatment(s)

Other factor(s)

Study design and finding(s)

Tucatinib [65]

–

To determine the MTD, antitumor activity, and pharmacokinetic properties of tucatinib

The tucatinib MTD was determined to be 600 mg twice daily; 22% of patients treated at the MTD had a partial response + SD

Tucatinib + trastuzumab + capecitabine [33]

ALT/AST

To evaluate the therapeutic responses of tucatinib vs. placebo combination with trastuzumab and capecitabine

Tucatinib-combination resulted in improved PFS and increased OS with common adverse events compared to the placebo-combination group

  1. HER2+ HER2-positive, MTD maximum tolerable dose, SD stable disease, ALT alanine aminotransferase, AST aspartate aminotransferase, PFS progression-free survival, OS overall survival