OBJECTIVES:
Primary
* Evaluate the efficacy of the addition of aprepitant in controlling acute vomiting with the standard prophylactic anti-emetic combination of granisetron hydrochloride and dexamethasone in patients receiving therapy comprising high-dose cyclophosphamide to mobilize stem cells prior to leukapheresis for autologous stem cell transplantation.
Secondary
* Evaluate the efficacy of the addition of aprepitant in controlling delayed vomiting in these patients.
* Evaluate the efficacy of the addition of aprepitant in controlling overall nausea in these patients.
* Identify side effects of the addition of aprepitant to this regimen in these patients.
OUTLINE: Patients receive granisetron hydrochloride orally or IV and oral dexamethasone, followed 1 hour later by cyclophosphamide IV over 2 hours on day 1. Patients also receive oral aprepitant once daily on days 1-3. Treatment continues in absence of unacceptable toxicity.
After completion of study treatment, patients are followed for 30 days.
PROJECTED ACCRUAL: A total of 35 patients will be accrued for this study.
