A phase I study of carboplatin and docetaxel for advanced non-small cell lung cancer using the continual reassessment method.

Purpose: This phase I study was designed to determine the maximum tolerated dose of carboplatin combined with a fixed dose of docetaxel (60 mg/m(2)) and the safety and efficacy of this combination chemotherapy in unresectable non-small cell lung cancer.

Methods: Patients received a 60 min intravenous infusion of docetaxel followed by a 90 min infusion of carboplatin with dose escalation using the continual reassessment method. The starting dose of carboplatin was targeted to an area under the plasma concentration curve of 3 using Calvert's equation and dose escalation was based on course 1 toxicities.

Results: From January 1999 to February 2000, 16 patients entered this trial. The major dose-limiting toxicity was neutropenia. Thrombocytopenia was rare and major non-hematological toxicities included fever that was not associated with neutropenia and grade 2 nausea and vomiting. Objective responses were seen in five patients (response rate 31.3%).

Conclusions: Based on this phase I clinical trial, the maximum tolerated dose of carboplatin combined with 60 mg/m(2) of docetaxel was a target area under the plasma concentration curve (tAUC) of 6 and the recommended tAUC for further trials is 5.5. This combination appeared to be effective for non-small cell lung cancer. A phase II clinical trial is recommended using 60 mg/m(2) of docetaxel and carboplatin with a tAUC of 5.5.