Levothyroxine sodium is prescribed for a client with hypothyroidism. The nurse should instruct the client to report which symptom because it indicates that the client is taking too much levothyroxine sodium?

A) Intolerance to cold: Intolerance to cold is a common symptom of hypothyroidism, not a sign of taking too much levothyroxine sodium. Therefore, this symptom would not indicate an overdose of the medication. B) Constipation: Constipation can be a symptom of hypothyroidism, and it may improve with appropriate thyroid hormone replacement therapy. It is not typically associated with taking too much levothyroxine sodium. C) Restlessness: This is the correct answer. Restlessness, anxiety, nervousness, or feeling jittery are symptoms of hyperthyroidism, which can occur if the client is taking too much levothyroxine sodium. If the dose of levothyroxine is too high, it can lead to hyperthyroid symptoms, even though the medication is intended to treat hypothyroidism. D) Decreased appetite: Decreased appetite is not a typical symptom of taking too much levothyroxine sodium. In fact, weight loss is more commonly associated with hyperthyroidism, which can occur if the dose of levothyroxine is too high. However, decreased appetite alone may not specifically indicate an overdose of levothyroxine.