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

Choice A reason: Profuse sweating is expected in thyrotoxicosis, as excess thyroid hormone (levothyroxine) increases metabolic rate and sympathetic activity, stimulating sweat glands. This hypermetabolic state causes heat intolerance and excessive perspiration, a hallmark symptom reflecting the body’s response to elevated thyroid hormone levels. Choice B reason: Dry skin is not typical in thyrotoxicosis, which causes warm, moist skin due to increased metabolism and vasodilation. Dry skin is more associated with hypothyroidism, where low thyroid hormone slows metabolic processes, making this an incorrect manifestation for thyrotoxicosis. Choice C reason: Bradycardia is not expected in thyrotoxicosis, which causes tachycardia due to thyroid hormone’s stimulation of beta-adrenergic receptors, increasing heart rate. Bradycardia occurs in hypothyroidism, making this an incorrect manifestation for a client with excess levothyroxine. Choice D reason: Drowsiness is not a feature of thyrotoxicosis, which causes hyperactivity, insomnia, and nervousness due to elevated thyroid hormone increasing metabolic rate and CNS stimulation. Drowsiness is more typical of hypothyroidism, making this an incorrect manifestation for thyrotoxicosis.