Final answer:
The nurse should document the client's response to the incorrect medication dose in the client's medical record, which is essential for tracking the immediate impact of the medication error on the client's health.
Step-by-step explanation:
The nurse should document the client's response to the incorrect dose in the client's medical record. This documentation is crucial because it involves the direct effects of the medication error on the client's health. It is important not to include the nurse's personal feelings, other instances of medication errors on the unit, or the corrective actions taken to prevent future errors, as these are not relevant to the client's medical record. The incident report is a separate document and is the appropriate place to detail the error, examine why it happened, and discuss the measures to prevent future errors.