We performed a clinical phase II trial of the combination of paclitaxel and cisplatin in patients with locally advanced (stage IIIB) or metastatic non-small-cell lung cancer (NSCLC) using a 3-h infusion of paclitaxel followed by a 1 to 2-h infusion of cisplatin, with a short premedication regimen. Treatment was repeated every 21 days for at least two cycles. The patients received paclitaxel 180 mg/m2 followed by cisplatin 80 mg/m2. Enrolled in the trial were 33 chemotherapy-naive patients with stage IIIB (15%) or stage IV (85%) NSCLC. Their median age was 61 years (range 43-71 years). Of the 33 patients, 10 (30%) were women and 23 (70%) were men, and 82% had adenocarcinoma. With 78 courses of chemotherapy administered, 32 patients were evaluable for toxicity and response. Hematologic toxicities were moderate: Japan Clinical Oncology Group (JCOG) grade 3 or 4 neutropenia occurred in 37% of the cycles (53% of patients). Other toxicities consisted mainly of grade 1 or 2 alopecia and nausea/vomiting, but also included grade 1 or 2 neuropathy (47%), hypotension (grade 1 in 6%, grade 3 in 3%) and allergic reactions (grade 1 or 2 in 16%, grade 3 in 3%). Of 32 patients evaluable for response, a partial response was achieved in 10 (31%; 95% confidence interval 16% to 50%), stable disease was seen in 16 (50%), and disease progression was seen in 2 (6%). The median survival time was 14.8 months and the 1-year survival rate was 56%. These results suggest that the combination of paclitaxel and cisplatin is a well-tolerated and active regimen in Japanese patients with advanced NSCLC. In view of the promising survival outcomes, further evaluation in prospective randomized trials with other regimens is warranted.