Trastuzumab Rezetecan: First Approval.

Trastuzumab rezetecan (Avida ) is a human epidermal growth factor receptor 2 (HER2)-directed antibody-drug conjugate being developed by Jiangsu HengRui Medicine Co., Ltd. for the treatment of various solid tumours, including breast cancer, colorectal cancer, gastric cancer, gastroesophageal junction adenocarcinoma and lung cancer. In May 2025, it was approved by the National Medical Products Administration of China for the treatment of adults with unresectable locally advanced or metastatic non-small cell lung cancer (NSCLC) who have human epidermal growth factor receptor 2 (HER2) [ERBB2]-activating mutations and have received ≥ 1 previous systemic treatment. This article summarizes the milestones in the development of trastuzumab rezetecan leading to this first approval.