A client with bipolar disorder takes lithium 300 mg 3 times daily. The nurse is educating the client on its use, side effects, and need for compliance. The nurse evaluates that the dose is appropriate when the client reports what?

Lithium carbonate is an antimanic agent that stabilizes glutamatergic neurotransmission. It effectively manages acute mania and prevents bipolar relapse by modulating intracellular signaling pathways. Therapeutic serum levels are narrow, typically 0.6 to 1.2 mEq/L, requiring consistent renal function monitoring and adequate sodium intake to prevent toxicity. Rationale: A. Increased feelings of self-worth can signal a return to grandiosity seen in manic or hypomanic episodes. Lithium's purpose is to suppress such manic symptoms rather than enhance them. The nurse should assess if the client is experiencing a breakthrough of symptoms despite the medication. B. Feeling sleepy and less energetic can be an adverse effect or a sign of lithium toxicity. While lithium modulates activity, excessive lethargy is not the desired therapeutic goal of treatment. This symptom requires further evaluation of the client's serum drug levels and thyroid function. C. Lithium is effective when the client achieves emotional stability with minimal mood swings. The drug regulates mood fluctuations without causing significant cognitive clouding or sedation. Maintenance of a euthymic state indicates that the dosage is sufficient to control the cycling of bipolar disorder. D. Weight gain is a common metabolic side effect of lithium therapy but does not indicate efficacy. Significant weight changes can lead to non-compliance and metabolic syndrome. The nurse evaluates clinical success based on psychological stability, not the presence of known adverse reactions.