JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

Phase III trial of casopitant, a novel neurokinin-1 receptor antagonist, for the prevention of nausea and vomiting in patients receiving moderately emetogenic chemotherapy

Jørn Herrstedt, Wichit Apornwirat, Ahmed Shaharyar, Zeba Aziz, Fausto Roila, Simon Van Belle, Mark W Russo, Jeremey Levin, Salabha Ranganathan, Mary Guckert, Steven M Grunberg
Journal of Clinical Oncology 2009 November 10, 27 (32): 5363-9
19805683

PURPOSE: The purpose of this phase III trial was to evaluate the efficacy and safety of regimens containing casopitant, a novel neurokinin-1 receptor antagonist, for the prevention of chemotherapy-induced nausea and vomiting during the first cycle in patients receiving moderately emetogenic chemotherapy (MEC).

PATIENTS AND METHODS: Predominantly female patients (98%) diagnosed with breast cancer (96%) who were chemotherapy-naïve and scheduled to receive an anthracycline and cyclophosphamide (AC) -based regimen were enrolled onto this multinational, randomized, double-blind, parallel-group, placebo-controlled clinical trial. All patients received dexamethasone 8 mg intravenously (IV) on day 1 and oral ondansetron 8 mg twice daily on days 1 to 3. Patients were randomly assigned to a control arm (placebo), a single oral dose casopitant arm (150 mg orally [PO] on day 1), a 3-day oral casopitant arm (150 mg PO on day 1 plus 50 mg PO on days 2 to 3), or a 3-day IV/oral casopitant arm (90 mg IV on day 1 plus 50 mg PO on days 2 to 3). The primary end point was the proportion of patients achieving complete response (no vomiting/retching or rescue medications) in the first 120 hours after the initiation of MEC.

RESULTS: A significantly greater proportion of patients in the single-dose oral casopitant arm, 3-day oral casopitant arm, and 3-day IV/oral casopitant arm achieved complete response (73%, 73%, and 74%, respectively) versus control (59%; P < .0001). The study did not demonstrate a reduced proportion of patients with nausea or significant nausea in those receiving casopitant. Adverse events were balanced among study arms.

CONCLUSION: All casopitant regimens studied were more effective than the control regimen. Casopitant was generally well tolerated.

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