The nurse is caring for a patient who is receiving a third dose of high-dose cyclophosphamide (Cytoxan). The nurse notes hematuria. The nurse will notify the provider and will perform which action?
a. Ask whether the patient takes allopurinol (Lopurin).
b. Assess the patient's skin and fingernails for darkening.
c. Question the patient about fluid intake.
d. Reassure the patient that this is an expected side effect.