A nurse is reinforcing teaching with a client who takes lithium carbonate for bipolar disorder. For which of the following findings should the nurse monitor as an adverse effect of lithium carbonate?

A. Lithium can cause hypothyroidism and goiter as adverse effects. Therefore, monitoring of thyroid function and physical examination for thyroid enlargement is necessary during lithium therapy. B. Constipation is not a typical adverse effect of lithium carbonate. It's more commonly associated with side effects such as nausea, diarrhea, or polyuria. C. Hyporeflexia is not commonly associated with lithium carbonate use. Lithium more commonly affects the central nervous system, leading to symptoms such as tremors, confusion, and seizures in cases of toxicity. D. Lithium is more commonly associated with the opposite effect, lowering blood pressure rather than elevating it. It's known to have effects on sodium transport in renal tubules, leading to increased water retention and possibly hypotension.