This phase II study evaluated the activity of gemcitabine (Gemzar) plus cisplatin (Platinol) as first-line treatment of advanced epithelial ovarian cancer. Forty-two chemonaive patients with advanced (stage III and IV) epithelial ovarian cancer received gemcitabine 1,250 mg/m(2) on days 1 and 8 and cisplatin 100 mg/m(2) on day 1, every 3 weeks, up to eight cycles. The median number of cycles completed was 5 (range 2-8). Of the 41 patients evaluable for tumor response, 20 had a partial response and nine had a complete response, for an overall clinical and pathologic response rate of 70.7% (95% CI 56.8-84.6%). Median overall survival for all 42 patients was 23.4 months (95% CI 15.9-29.9 months) and the median progression-free survival time was 10.4 months (95% CI 9.4-13.5 months). The combination was generally manageable. Hematologic toxicity (grade 3/4 neutropenia: 31.0/21.4%; grade 3/4 thrombocytopenia: 9.5/4.8%; grade 3/4 anemia: 11.9/0%) and nausea and vomiting (grade 3/4: 35.7/31.0%) were the most common toxicities. There was one toxic death (septic shock due to hematologic toxicity-induced infection). We conclude that gemcitabine plus cisplatin is active and feasible as first-line treatment of advanced epithelial ovarian cancer. Further clinical trials with the addition of gemcitabine to first-line treatment appear warranted.