OBJECTIVES: I. Determine the clinical complete and partial response rate, pathological complete response rate, disease-free survival, and duration of response produced by intraperitoneal dipyridamole/methotrexate (DP/MTX) administered as a 7-day continuous infusion in patients with advanced ovarian carcinoma that is recurrent following or refractory to cisplatin-based chemotherapy. II. Determine the peritoneal and systemic toxicity of DP/MTX.