 You will be asked to fill out a study diary daily for 7 days, and it should take you no longer than 10 minutes to complete. The diary will be used to record the number of episodes of nausea andor vomiting you experience during this study, as well as to record any need for extra medications, and to help researchers learn which of the 2 drugs helps the best to improve participants quality of life such as sleep, daily activities, and your ability to think and reason. 