A client with bipolar disorder taking lithium tells the nurse that he has ringing in his ears, blurred vision, and diarrhea. The nurse notices a slight tremor in his left hand and a slurring pattern to his speech. Which of the following actions by the nurse is appropriate?
A. Administer a stat dose of lithium as necessary.
B. Recognize this as an expected response to lithium.
C. Request an order for a stat blood lithium level.
D. Give an oral dose of lithium antidote.