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  • Title: Phase I/pharmacokinetic study of intraperitoneal cisplatin and etoposide.
    Author: Zimm S, Cleary SM, Lucas WE, Weiss RJ, Markman M, Andrews PA, Schiefer MA, Kim S, Horton C, Howell SB.
    Journal: Cancer Res; 1987 Mar 15; 47(6):1712-6. PubMed ID: 3815369.
    Abstract:
    We administered cisplatin and etoposide by peritoneal dialysis to 39 patients with i.p. malignancies in order to investigate the toxicity, pharmacokinetics, and clinical activity of this 2-drug combination. All patients received i.v. sodium thiosulfate concurrently with the i.p. chemotherapy. Myelosuppression, nausea, vomiting, and malaise were the primary toxicities encountered. The maximum tolerated dose of etoposide was 350 mg/m2, when administered with a fixed dose of cisplatin, 200 mg/m2. Although the total (free and protein-bound) etoposide exposure for the peritoneal cavity was only 1.5-fold greater than that for the plasma, the free (non-protein bound) etoposide peritoneal exposure was 65-fold greater than the plasma. Tumor regressions were noted in patients with ovarian and pancreatic carcinomas. This study is the first demonstration of the large pharmacokinetic advantage that exists for the i.p. administration of highly protein-bound drugs, and it also documents the clinical activity of i.p. cisplatin and etoposide.
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