 Before every time you take AZD1775 tablets, you will take ondansetron Zofran. Before your first dose of AZD1775 each week, you will take dexamethasone. You may also receive dexamethasone before additional doses of AZD1775. Ondansetron and dexamethasone are standard drugs given to help decrease the risk of side effects. You may ask the study staff for information about how the drugs are given and their risks. 