- Pregnant or breast-feeding (While both aprepitant and ondansetron are classified as Category B drugs, an eligibility criteria for this study is that the patient be scheduled to receive a temozolomide-based chemotherapy regimen +/- bevacizumab, which are Category D and C drugs respectively. Therefore, while not considered necessary for the administration of the current study drugs, a pregnancy test should be a part of normal clinical care for the patients in this study, if the patient is determined to be of child-bearing potential.)