What monitoring is essential for mood stabilizers like lithium?

• A. Regular serum lithium levels, renal function, and thyroid function.
• B. Only appetite and sleep patterns.
• C. Daily imaging studies.
• D. Only blood pressure.

Answer: (A)

Regular monitoring of mood stabilizers like lithium focuses on keeping the drug within a safe and effective range while watching for organ-specific side effects. Lithium has a narrow therapeutic window, so regular serum levels help ensure it works without causing toxicity. Because lithium is mostly cleared by the kidneys, assessing renal function baseline and over time is essential to detect any impact on kidney function and to guide dosing. Lithium also frequently affects the thyroid, so monitoring thyroid function tests (like TSH and free T4) is important to catch hypothyroidism early. Appetite and sleep patterns don’t reveal these risk areas, imaging studies aren’t part of routine monitoring, and blood pressure alone doesn’t address the key organ systems involved or the risk of toxicity.