Erika Hamilton, MD, Sarah Cannon Research Institute, Nashville, TN, discusses the Phase I dose escalation data from a Phase I/II study (NCT04072952) that aims to assess the safety and efficacy of vepdegestrant (ARV-471) in heavily pre-treated patients with ER2+/HER2- locally advanced or metastatic breast cancer. The drug was very well-tolerated: no dose-limiting toxicities were observed at any dose level. Of 83 patients, 24% had any grade of nausea. 24% experienced fatigue and 13% experienced arthralgia (all Grade 1 or 2). This interview took place at the European Society for Medical Oncology (ESMO) 2023 Congress in Madrid, Spain.
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