Measurement of plasma lithium levels is an essential component of treatment. Lithium levels must be kept below.

1.5 mEq/L

0.4 mEq/L

0.2 mEq/L

0.8 mEq/L

Answer and Explanation

The Correct Answer is A

Therapeutic drug monitoring is essential when using lithium because it has a narrow therapeutic index and a high risk of toxicity. Plasma levels must be carefully maintained within a defined therapeutic range to ensure effectiveness in mood stabilization while preventing adverse effects. Levels are routinely checked to guide dosing and prevent accumulation. Toxic effects become more likely as serum concentrations rise above the safe threshold.

Rationale:
A. Lithium levels should generally be kept below 1.5 mEq/L because concentrations above this range are associated with toxicity. At higher levels, patients may develop neurologic, gastrointestinal, and cardiovascular symptoms that can rapidly progress to severe toxicity. Maintaining levels below this threshold reduces the risk of serious complications.

B. 0.4 mEq/L is below the therapeutic range and would likely be ineffective for mood stabilization in Lithium therapy. Subtherapeutic levels may result in poor control of manic or depressive symptoms and increase the risk of relapse.

C. 0.2 mEq/L is significantly below therapeutic levels and is insufficient for clinical efficacy. At this concentration, lithium would not provide adequate mood stabilization or prophylaxis against bipolar episodes. It is far under the expected therapeutic range.

D. 0.8 mEq/L represents a typical maintenance therapeutic level rather than a maximum limit. Lithium is often maintained between approximately 0.6–1.2 mEq/L depending on clinical indication and patient response. This reflects a target range, not an upper toxicity threshold.

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Free Nursing Study Resources

Correct Answer is C

Explanation

Long-term management of Fluoxetine involves maintaining remission of depressive symptoms while preventing relapse. Even when a patient reports sustained improvement and functional recovery, antidepressants are not stopped abruptly due to the risk of symptom recurrence and discontinuation effects. Decisions about stopping therapy require a structured, supervised plan that includes dose tapering and clinical monitoring. Individualized assessment of relapse risk, duration of remission, and history of depressive episodes guides safe discontinuation.

Rationale:
A. Stopping the drug abruptly is unsafe because sudden withdrawal of fluoxetine can lead to discontinuation symptoms such as mood instability, irritability, and sleep disturbances. Although fluoxetine has a long half-life, it still requires careful tapering in many patients. Abrupt cessation also increases the risk of depressive relapse, especially after long-term treatment.

B. A drug holiday is not an evidence-based or safe strategy for antidepressant management. Temporary cessation does not assess true remission and may destabilize neurotransmitter balance, leading to rebound symptoms. This approach may actually trigger a recurrence of depressive symptoms.

C. Discussing gradual withdrawal with the provider is the safest and most appropriate approach. A supervised taper allows monitoring for recurrence of depressive symptoms while minimizing withdrawal effects. The provider can evaluate risk factors and determine whether continued maintenance therapy or stepwise discontinuation is indicated.

D. Indefinite therapy is not universally required for all patients with depression. While some individuals with recurrent or severe depression may need long-term treatment, others in sustained remission may successfully taper off medication under supervision. Treatment duration should be individualized rather than automatically lifelong.

A. If the absolute neutrophil count (ANC) is less than 1000, the drug will be discontinued permanently B. Blood counts are necessary for several weeks after discontinuation of the drug C. Use of this drug requires weekly evaluation of blood work D. Fever, sore throat, and sores in the mouth should be reported immediately

Correct Answer is A

Explanation

Clozapine is an atypical antipsychotic reserved for treatment-resistant schizophrenia and for patients with persistent suicidal behavior. It is highly effective but carries a serious risk of agranulocytosis, requiring strict hematologic monitoring. Regular assessment of white blood cell (WBC) count and absolute neutrophil count (ANC) is essential to detect bone marrow suppression early. Patient and family education focuses on monitoring schedules and recognizing signs of infection.

Rationale:
A. An ANC below 1000/mcL (moderate neutropenia) requires the medication to be interrupted, but it does not mandate permanentdiscontinuation. Usually, the drug is held and the patient is monitored daily. Once the ANC rises above 1000/mcL, the patient can often be "rechallenged" or restarted on the drug with increased monitoring. Permanent discontinuation is typically only required for "generalized agranulocytosis" (ANC < 500/mcL) or if a patient fails a rechallenge.

B. Blood counts must continue to be monitored for several weeks after discontinuation because neutropenia or agranulocytosis can persist or develop even after the medication is stopped. Ongoing surveillance ensures early detection of delayed complications. This reflects accurate understanding of post-discontinuation care.

C. Weekly blood work is required during the initial phase of clozapine therapy to closely monitor for early signs of neutropenia. Although frequency may later decrease, early intensive monitoring is essential for safety. This statement demonstrates appropriate knowledge of the monitoring protocol.

D. Fever, sore throat, and oral ulcers are key early signs of infection related to neutropenia. Immediate reporting is critical because reduced neutrophil levels impair the body’s ability to fight infections. Recognizing these symptoms supports timely intervention and reflects correct understanding.

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Measurement of plasma lithium levels is an essential component of treatment. Lithium levels must be kept below.

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is C

Explanation

Correct Answer is A

Explanation

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