- Received a prior 5-hydroxytryptamine type 3 (5-HT3) receptor antagonist antiemetic (ondansetron, granisetron, tropisetron, or dolasetron mesylate) with dexamethasone (DM) given at any dose and by any route (or equivalent dose of IV methylprednisolone (MePRDL)) on day 1 of course 1 of chemotherapy