The primary objective of this study is to determine the complete response (no vomiting and no need for other medications to treat nausea) in terminally ill patients suffering from nausea and/or vomiting, who are treated with palonosetron. Another objective is to determine the partial response (relief of nausea and vomiting to the extent that the patient wishes to continue treatment with palonosetron) after being treated with palonosetron. Palonosetron is currently approved by the FDA to prevent nausea and vomiting associated with chemotherapy. The investigators are testing this medication to see if it can help to relieve nausea and vomiting not associated with chemotherapy.