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Why does a nurse on an oncology unit verify a client's current cumulative lifetime dose of doxorubicin before administering it to a client with breast cancer?

  • A. Excessive doxorubicin can result in myelosuppression.
  • B. Exceeding the lifetime cumulative dose limit of doxorubicin may lead to extravasation.
  • C. An excess amount of doxorubicin can lead to cardiomyopathy.
  • D. Exceeding the lifetime cumulative dose limit of doxorubicin may cause red-tinged urine and sweat.
Correct Answer: C

Rationale: Verifying the client's current cumulative lifetime dose of doxorubicin is necessary because excessive amounts of the medication can lead to cardiomyopathy, a serious and potentially life-threatening side effect. By monitoring the cumulative dose, healthcare providers can help prevent cardiotoxicity and ensure patient safety during treatment.