A patient with bipolar disorder is being treated with lithium. What laboratory test will provide the nurse with information on the effectiveness and toxicity of the patient's lithium levels?
1. Complete blood count
2. Basic metabolic panel
3. Urinalysis
4. Serum level test
Answer: 4
Explanation: A serum level test will monitor therapeutic levels of medications, such as lithium, in order to test for effectiveness ranges and to prevent drug toxicity. A complete blood count (CBC) may be ordered to monitor for infections, toxins, preexisting conditions, or responses to medications. A basic metabolic panel (BMP) may be ordered to identify preexisting conditions or monitor side effects to medication. Urinalysis can reveal pregnancy, diabetes, proteins, or drug abuse.
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