RATIONALE: Ondansetron may help lessen or prevent nausea and vomiting in patients undergoing stem cell transplant. PURPOSE: This phase II trial is studying how well ondansetron works in preventing nausea and vomiting in patients undergoing stem cell transplant.
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Reduction in Rates of Nausea or Vomiting After Ondansetron (Compared to FHCRC Historical Rates)
Timeframe: Baseline up to 120 minutes