Toxicity of a new dosage format, cisplatin incorporated in lactic acid oligomer microspheres, in mice
1992
: A new drug delivery system, cisplatin incorporated into lactic acid oligomer microspheres (CDDP-MS), was developed for the treatment of peritoneal carcinomatoses. We studied the acute toxicity and pathological effects of CDDP-MS injected intraperitoneally in mice. The 50% lethal dose was 23.8 mg/kg (21.3-26.7 mg/kg at 95% level of confidence), which was 1.76 times that of the cisplatin aqueous solution of 13.5 mg/kg (11.9-15.3 mg/kg at 95% level of confidence). The duration for the restoration of the body weight loss was prolonged when CDDP-MS at doses close to the 50% lethal dose was administered, as compared with the cisplatin aqueous solution at doses close to its 50% lethal dose. On autopsy there were no macroscopic or microscopic differences between the two dosage forms.
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