Key clinical point: Patients with metastatic breast cancer (BC) who received oral paclitaxel plus encequidar to facilitate the absorption of oral paclitaxel showed higher confirmed tumor response compared with 3 weekly intravenous (IV) paclitaxel doses.
Major finding: Confirmed tumor response rate improved significantly with oral paclitaxel+encequidar vs IV paclitaxel (36% vs 23%; P = .011). The incidence of grade ≥2 neuropathy (31% vs 8%) and grade 2 alopecia (48% vs 29%) were higher with IV paclitaxel vs oral paclitaxel+encequidar; however, the incidence of grade ≥3 gastrointestinal disorders (11.7% vs 3.7%) was higher with oral paclitaxel+encequidar vs IV paclitaxel.
Study details : Findings are from the open-label, phase 3 study including 402 postmenopausal women with metastatic BC who were randomly assigned to receive oral paclitaxel+encequidar or IV paclitaxel.
Disclosures: This study was supported by Athenex, Inc. Four authors declared being employees and owning stocks in Athenex, and the other authors reported ties with several sources, including Athenex.
Source: Rugo HS et al. Open-label, randomized, multicenter, phase III study comparing oral paclitaxel plus encequidar versus intravenous paclitaxel in patients with metastatic breast cancer. J Clin Oncol. 2022 (Jul 20). Doi: 10.1200/JCO.21.02953