One among the following indicates the possibility of Lithium toxicity:

IGNOU PB Bsc Nsg.Entrance-2026

Pharmacology

Easy

Appeared in: IGNOU PB Bsc Nsg.Entrance-2026

Explanation

Gastrointestinal (GI) disturbances, including vomiting and nausea, are hallmark early signs of lithium toxicity.
These symptoms typically appear when serum lithium levels rise to the mild-to-moderate toxicity range of 1.5 to 2.0 mEq/L.
The body's inability to manage the increased lithium concentration manifests first in the GI tract before progressing to more severe neurological symptoms.
Recognizing these early GI signs is critical for preventing progression to severe, life-threatening toxicity.

Option B: Urinary incontinence is not a direct sign of lithium toxicity. While lithium can cause polyuria (increased urine output) and nephrogenic diabetes insipidus as a renal side effect, this does not typically manifest as incontinence.
Option C: Orthostatic hypotension is not a characteristic sign of lithium toxicity. It is a more common side effect of other psychotropic medications like antipsychotics and tricyclic antidepressants.
Option D: Neck rigidity is a classic symptom of Neuroleptic Malignant Syndrome (NMS), a rare reaction to antipsychotic drugs, or meningitis. It is not associated with lithium toxicity.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Signs and symptoms of Lithium Toxicity as background academic context rather than a clinical decision trigger.
Nurses must educate patients on lithium to maintain consistent fluid (2-3 L/day) and sodium intake, as dehydration or low sodium can precipitate toxicity.
Early recognition of GI symptoms like nausea and vomiting is a critical nursing responsibility to prevent progression to severe neurological damage or death. The nurse should instruct the patient to hold the dose and call the provider.
What if? If a patient on lithium develops gastroenteritis (stomach flu) with vomiting and diarrhea, they are at high risk for dehydration, which can rapidly increase lithium levels to a toxic range. The nurse must advise immediate medical evaluation.

How to Approach the Question

First, identify the keyword in the question stem: 'Lithium toxicity'. This directs you to recall the specific adverse effects associated with high levels of this drug.
Recall the key characteristic of lithium: it has a very narrow therapeutic index, meaning toxicity is a common and serious risk.
Systematically review the signs of toxicity. Remember that early signs are often gastrointestinal (nausea, vomiting, diarrhea) and neurological (fine tremor becoming coarse).
Evaluate each option against this knowledge. 'Vomiting and Nausea' are classic early GI symptoms.
Eliminate the other options by associating them with different conditions: 'Incontinence' is related to polyuria (a side effect, not toxicity sign), 'Orthostatic hypotension' is common with other psychotropics, and 'Neck rigidity' points towards NMS or meningitis.

Concept Tested & Keywords

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