A phase I trial of olanzapine (zyprexa) for the prevention of delayed emesis in cancer patients: A hoosier oncology group study

Academic Article


  • Chemotherapy-induced delayed emesis (DE) can affect up to 50% to 70% of patients receiving moderately and highly emetogenic chemotherapy, although rates are improving. DE most commonly occurs within the first 24 to 48 hours of chemotherapy administration and can persist for 2 to 5 days. Olanzapine, due to its activity at multiple dopaminergic, serotonergic, muscarinic, and histaminic receptor sites, has potential as antiemetic therapy. A phase I study was designed with olanzapine, using a four-cohort dose escalation of 3 to 6 patients per cohort, for the prevention of DE in cancer patients receiving their first cycle of chemotherapy consisting of cyclophosphamide, doxorubicin, platinum, and/or irinotecan. All patients received standard premedication. Olanzapine was administered on days -2 and -1 prior to chemotherapy and continued for 8 days (days 0-7). Episodes of vomiting as well as daily measurements of nausea, sedation, and toxicity were monitored at each dose level. Fifteen patients completed the protocol. No grade 4 toxicities were seen, and three patients experienced a dose-limiting toxicity (grade 3) of a depressed level of consciousness during the study. The maximum tolerated dose appeared to be 5 mg (for days -2 and -1) and 10 mg (for days 0-7). Four of six patients receiving highly emetogenic chemotherapy (cisplatin, ≥ 70 mg/m2) and nine of nine patients receiving moderately emetogenic chemotherapy (doxorubicin, ≥ 50 mg/m2) had complete control (no vomiting episodes) of DE. Therefore, olanzapine may be an effective agent for the prevention of chemotherapy-induced DE. A phase II trial is underway.
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    Author List

  • Passik SD; Navari RM; Jung SH; Nagy C; Vinson J; Kirsh KL; Loehrer P
  • Start Page

  • 383
  • End Page

  • 388
  • Volume

  • 22
  • Issue

  • 3