Abstract
Purpose
We investigated the efficacy and toxicity of a novel oral 5-fluorouracil (5-FU) formulation (S-1), administered according to a tailored dose regimen.
Methods
S-1 was administered orally for 28 days, followed by 14 days of no treatment, in 23 patients who received a tailored dose of S-1, adjusted on the basis of individual creatinine clearance and body surface area. In 8 of the patients, pharmacokinetic study was performed on the 6 points on 7th day after S-1 administration.
Results
Of the 23 patients enrolled in this study, 2 (8.7 %) had a partial response and 14 (60.9 %) had stable disease. The disease control rate was 69.6 % (16/23) (95 % confidence interval, 50.8–88.4 %). Grade 3/4 hematologic and non-hematologic toxicities were minor. In the pharmacokinetic study group, the maximum plasma concentration (C max) and the area under the plasma concentration curve of 5-FU at all 6 points after administration of the tailored S-1 dose regimen were similar to the values reported in a previous study describing cancer patients with normal renal function who received a standard dose of S-1 (80 mg/m2/day).
Conclusions
Our results suggest that tailored S-1 monotherapy is safe and therapeutically useful as first-line treatment for elderly patients with advanced and recurrent non-small cell lung cancer.
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Acknowledgments
We are indebted to the physicians and all other co-medical staff who contributed to this study. We thank J Patrick Barron of the International Medical Communications Centre of Tokyo Medical University (Tokyo, Japan) for his review of this report. We particularly thank Dr. T. Shimokawa who statistically supported.
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Shiroyama, T., Kijima, T., Komuta, K. et al. Phase II tailored S-1 regimen study of first-line chemotherapy in elderly patients with advanced and recurrent non-small cell lung cancer. Cancer Chemother Pharmacol 70, 783–789 (2012). https://doi.org/10.1007/s00280-012-1958-z
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DOI: https://doi.org/10.1007/s00280-012-1958-z