Which of the following clinical features alerts the nurse to lithium toxicity?

BCCL kharkhanda Staff Nurse - 2015

Mental Health Nursing

Easy

Appeared in: BCCL kharkhanda Staff Nurse - 2015

Explanation

Anorexia (loss of appetite), nausea, and vomiting are classic early warning signs of lithium toxicity.
These gastrointestinal (GI) symptoms often appear first when blood levels of lithium begin to exceed the therapeutic range.
Recognizing these early GI signs is critical for prompt intervention to prevent progression to more severe neurological and cardiovascular toxicity.
Source SRC_12297 and SRC_12299 list GI symptoms like nausea, vomiting, and anorexia as key indicators of toxicity.

Option A: Increased agitation is not a specific or primary sign of lithium toxicity. While excitement or delirium can occur at moderate levels, it's often difficult to distinguish from the symptoms of the underlying psychiatric condition.
Option B: Lithium toxicity typically causes anorexia (loss of appetite), as noted in source SRC_12298 for moderate to severe intoxication. Increased food intake is the opposite of what is expected.
Option C: A sudden increase in blood pressure is not a characteristic feature of lithium toxicity. In severe cases, circulatory failure and lowered blood pressure are more likely (Source: SRC_12298).

Clinical Relevance

Nursing practice connection: Knowing Recognition of Lithium Toxicity Signs helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses must educate patients on lithium to maintain consistent fluid (2-3 L/day) and sodium intake, as dehydration or low sodium can quickly lead to toxic levels.
Early detection of GI symptoms like nausea and vomiting is a critical nursing responsibility that can prevent life-threatening complications.
What if? If a patient on lithium is prescribed a diuretic (e.g., for hypertension), the risk of toxicity increases significantly. The nurse must ensure lithium levels are monitored more frequently and the patient is educated about signs of dehydration and toxicity.

How to Approach the Question

First, identify the keyword in the question: 'lithium toxicity'. This directs you to recall the specific signs and symptoms associated with this condition.
The phrase 'alerts the nurse' suggests you should look for early or initial signs of toxicity, as these are the first warnings.
Systematically review each option. Think about the common side effects versus toxic effects of lithium.
Recall that gastrointestinal disturbances are among the earliest and most common indicators of rising lithium levels.
Evaluate 'Anorexia with nausea and vomiting'. This matches the known early signs of GI upset from lithium toxicity.
Eliminate the other options: Agitation is non-specific, increased food intake is the opposite of the expected anorexia, and increased blood pressure is not a characteristic sign.

Concept Tested & Keywords

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E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) pp. 2057-2059, 2058-2060, 2053-2055