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
B.
Dry skin
C.
Bradycardia
D.
Heat intolerance
The Correct Answer and Explanation is:
The correct answer is D. Heat intolerance.
Thyrotoxicosis, also known as thyroid storm or thyrotoxic crisis, is a condition that results from excessive levels of thyroid hormones in the bloodstream, commonly caused by an overdose of thyroid hormone medication like levothyroxine. Levothyroxine is a synthetic form of thyroxine (T4), which is converted into the active thyroid hormone triiodothyronine (T3) in the body. These hormones play a crucial role in regulating the body’s metabolism.
Heat Intolerance:
One of the key manifestations of thyrotoxicosis is heat intolerance. When the body has an excessive amount of thyroid hormones, the metabolic rate increases significantly. This heightened metabolism generates more heat, leading to an inability to tolerate warm environments or high temperatures. Clients often feel excessively warm, sweat profusely, and prefer cooler environments. This happens because thyroid hormones stimulate various metabolic processes, including increasing the production of energy, which releases heat as a byproduct.
Incorrect Answers:
- A. Drowsiness: This is incorrect. Thyrotoxicosis typically causes symptoms like restlessness, insomnia, and irritability due to the increased metabolic and nervous system activity. Drowsiness is more commonly associated with hypothyroidism, where the metabolic rate slows down.
- B. Dry skin: This is also incorrect. Dry skin is a common symptom of hypothyroidism, where thyroid hormone levels are too low. In hyperthyroidism or thyrotoxicosis, the skin is often warm, moist, and sweaty due to the overactive metabolism.
- C. Bradycardia: This is incorrect because thyrotoxicosis usually causes tachycardia (rapid heart rate), not bradycardia (slow heart rate). Thyroid hormones increase heart rate and contractility, which can lead to palpitations and arrhythmias.
In summary, the hallmark of thyrotoxicosis is an overall increase in metabolism, leading to symptoms like heat intolerance, tachycardia, restlessness, and excessive sweating. The nurse should be aware of these manifestations when assessing a client who has taken too much levothyroxine.