Will the cancer drug cause nausea for an extended period of time if the drug lasts as long as 7 days in the body, and if so, can the patient take Compazine or Zofran?

It is typical for patients to be prescribed prophylactic agents when cyclophosphamide is administered – Dexamethasone and a serotonin-antagonist such as ondansetron (Zofran) are often offered.