Will the cancer drug cause nausea for an extended period of time if the drug lasts as long as seven 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.