A patient with diagnosed bipolar disorder was hospitalized 7 days ago and has been taking Lithium 600 mg TID. Staff observes increased agitation, pressured speech, poor personal hygiene, and hyperactivity. Which action demonstrates that the nurse understands the most likely cause of the patient's behaviour?

Reasoning: Choice A reason: Attempting to provide hygiene education to a patient in an acute manic state is clinically inappropriate and ineffective. During mania, the patient lacks the cognitive focus and impulse control necessary to engage in structured learning. Hygiene issues are a symptom of the mania, not a lack of knowledge. Choice B reason: Increasing the dose without first establishing the current serum concentration is dangerous. Lithium has a very narrow therapeutic index, typically 0.6 to 1.2 mEq/L. If the patient is actually taking the medication and the level is already high, an increase could lead to life-threatening lithium toxicity. Choice C reason: Lithium typically takes 7 to 14 days to reach therapeutic steady-state levels and show clinical improvement. However, if a patient remains highly symptomatic after 7 days on a robust dose like 1800 mg daily, the nurse must investigate medication adherence (cheeking) or subtherapeutic serum levels before adjusting the regimen. Choice D reason: While monitoring and documentation are standard nursing responsibilities, they do not address the underlying clinical problem. The patient’s safety and stabilization depend on active intervention to ensure the medication is therapeutic. Passive observation allows the manic episode to continue, increasing the risk of exhaustion or injury.