A nurse is reinforcing teaching with a client who has hypothyroidism and a new prescription for levothyroxine. The nurse should instruct the client to notify the provider of which of the following manifestations of thyrotoxicosis?

Thyrotoxicosis refers to a state of excess thyroid hormone in the body, which can occur as a result of excessive levothyroxine dosage or other causes. Nervousness is a common symptom of thyrotoxicosis, characterized by an excessive or uncontrollable feeling of anxiety or restlessness. It is important for the client to report this symptom to the healthcare provider because it may indicate an imbalance in thyroid hormone levels and may require adjustment of the medication dosage. Polyuria, which refers to increased urination, is not a specific symptom of thyrotoxicosis. It can occur due to various factors unrelated to thyroid function. Pruritus, or itching, is not a common symptom of thyrotoxicosis. It may be associated with other conditions or causes. Cough is not typically associated with thyrotoxicosis. It is more commonly related to respiratory or pulmonary conditions rather than thyroid dysfunction.