Final answer:
When a nurse administers more medication than was ordered, they should document the amount given in the medical record and report the error to the patient's physician.
Step-by-step explanation:
When a nurse realizes that more medication was given than was ordered, the appropriate action to take is to document the amount given in the medical record but report the error to the patient's physician.
It is important to notify the physician so that they can assess the situation and determine the best course of action for the patient's well-being. Additionally, documenting the error in the medical record is crucial for accuracy and transparency in patient care.