Final answer:
Caring for two patients with the same last name can lead to a medication error involving the right patient of medication administration.
Step-by-step explanation:
The nurse knows that caring for two patients with the same last name can lead to a medication error involving the right patient of medication administration. The right patient refers to ensuring that the medication is given to the correct individual. In this scenario, if there are two patients with the same last name, there is a higher risk of medication mix-ups or administering the medication to the wrong patient.