A client diagnosed with BP disorder is exhibiting severe manic behaviors. A physician prescribes lithium carbonate (Eskalith) and olanzapine (Zyprexa). The client's spouse questions the Zyprexa order. Which is the appropriate nursing response?
A. Zyprexa in combination with Eskalith cures manic symptoms.
B. Zyprexa prevents extrapyramidal side effects.
C. Zyprexa ensures a good night's sleep.
D. Zyprexa calms hyperactivity until the Eskalith takes effect.