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Updated: Oct 23, 2025
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Randomized phase III study of docetaxel versus docetaxel plus intercalated erlotinib in patients with relapsed
Christi M J Steendam1, Robert Peric2, Nico C van Walree3
1Department of Pulmonary Diseases, Erasmus MC Cancer Institute, University Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD, the Netherlands; Department of Pulmonary Diseases, Amphia Hospital Breda, Molengracht 21, 4818 CK, the Netherlands.
Background:
Earlier preclinical and phase II research showed enhanced effect of docetaxel plus intercalated erlotinib. The NVALT-18 phase III study was designed to compare docetaxel with docetaxel plus intercalated erlotinib in relapsed metastasized non-squamous (NSQ) non-small cell lung cancer (NSCLC).
Methods:
Patients with relapsed Epidermal Growth Factor Receptor (EGFR) wild type (WT) NSQ-NSCLC were randomized 1:1 to docetaxel 75 mg/m2 intravenously on day 1 every 21 days (control), or docetaxel 75 mg/m2 intravenously on day 1 plus erlotinib 150 mg/day orally on day 2-16 every 21 days (experimental arm). Progression free survival (PFS) was the primary endpoint, secondary objectives were duration of response, overall survival (OS) and toxicity.
Results:
Between October 2016 and April 2018 a total of 45 patients were randomized and received treatment in the control (N = 23) or experimental arm (N = 22), the study was stopped due to slow accrual. Median PFS was 4.0 months (95% CI: 1.5-7.1) versus 1.9 months (95% CI 1.4-3.5), p = 0.01 respectively; adjusted hazard ratio (HR) 2.51 (95% CI: 1.16-5.43). Corresponding median OS was 10.6 months (95% CI: 7.0-8.6) versus 4.7 months (95% CI: 3.2-8.6), p = 0.004, with an adjusted HR of 3.67 (95% CI: 1.46-9.27). Toxicity was higher with combination therapy, with toxicity ≥ CTCAE grade 3 in N = 6 (26%) in the control arm and N = 17 (77%) in the experimental arm (p < 0.001), mainly consisting of gastrointestinal symptoms and leukopenia.
Conclusions:
Our study shows detrimental effects of docetaxel plus intercalated erlotinib, and strongly discourages further exploration of this combination in clinical practice.
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