A nurse is assessing a client who has thyrotoxicosis after taking too high of a level of levothyroxine. Which of the following manifestations should the nurse expect?

A. Drowsiness is not a typical manifestation of thyrotoxicosis. Instead, individuals with thyrotoxicosis often experience restlessness and anxiety due to excessive thyroid hormone levels.

B. Dry skin is more commonly associated with hypothyroidism (insufficient thyroid hormone levels), rather than thyrotoxicosis (excessive thyroid hormone levels).

C. Bradycardia (slower than normal heart rate) is a symptom of hypothyroidism, not thyrotoxicosis. In thyrotoxicosis, tachycardia (an abnormally rapid heart rate) is a common finding.

D. Correct. Heat intolerance is a classic symptom of thyrotoxicosis. Excessive thyroid hormone levels can lead to an increased metabolic rate, making individuals more sensitive to heat.

A. Incorrect. Withholding insulin during illness is not recommended. Clients with type 1 diabetes should continue to take their prescribed insulin even when they are ill. Insulin is necessary to regulate blood glucose levels, and illness can increase the body's demand for insulin.

B. Incorrect. Drinking calorie-free liquids is important to prevent dehydration during illness, but specific fluid amounts should be individualized based on the client's needs and healthcare provider's recommendations. The given volume is not a universally applicable guideline.

C. Incorrect. Testing blood glucose levels every 8 hours may not be frequent enough during illness. Blood glucose should be monitored more frequently to closely track changes in response to illness and adjust insulin doses accordingly.

D. Correct. Checking urine for ketones when blood glucose levels exceed 240 mg/dL is an important guideline during illness. Elevated blood glucose levels can lead to the production of ketones, and checking for ketones in the urine helps identify the early signs of diabetic ketoacidosis (DKA). If ketones are present, the client should follow a specific plan of action as outlined by their healthcare provider, which may include adjusting insulin doses or seeking medical attention.