The nurse is caring for a client with hypothyroidism who has a history of myocardial infarction and heart failure.
What thyroid replacement drug would the nurse expect to be ordered?

Levothyroxine.

Thyroid desiccated.

Methimazole.

Liothyronine.

Answer and Explanation

The Correct Answer is A

Levothyroxine is a synthetic form of thyroxine, the hormone that the thyroid gland normally produces. It is used to treat hypothyroidism by replacing the missing hormone and restoring the normal metabolism.

Some explanations for the other choices are:

• Choice B. Thyroid desiccated is a natural thyroid hormone derived from animal thyroid glands.

It contains both T4 and T3 hormones, which may cause side effects or complications in some people with hypothyroidism. It is not recommended as a first-line treatment for hypothyroidism.

• Choice C. Methimazole is an antithyroid drug that blocks the production of thyroid hormones.

It is used to treat hyperthyroidism, not hypothyroidism. Giving methimazole to someone with hypothyroidism would worsen their condition.

• Choice D. Liothyronine is a synthetic form of T3, the active thyroid hormone.

It is sometimes used in combination with levothyroxine to treat hypothyroidism, but it is not a standard treatment. It has a shorter half-life and more variable effects than levothyroxine, and it may increase the risk of cardiac arrhythmias or osteoporosis.

Normal ranges for thyroid function tests vary depending on the laboratory and the method used, but generally they are:

• TSH: 0.4 to 4.0 mIU/L

• Free T4: 0.8 to 2.0 ng/dL

• Free T3: 2.3 to 4.2 pg/mL

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Correct Answer is B

Explanation

This is because hypothyroidism can reduce the metabolism and clearance of theophylline, leading to higher serum levels and increased risk of toxicity. Therefore, when the thyroid function is restored by levothyroxine or liothyronine, the dose of theophylline may need to be lowered to avoid excessive effects.

Choice A is wrong because decreasing theophylline dosage immediately may result in suboptimal control of asthma symptoms.

The dose adjustment should be based on serum theophylline levels and clinical response.

Choice C is wrong because discontinuing the client’s theophylline may cause worsening of asthma and potentially life-threatening complications.

Theophylline is an important bronchodilator that should not be stopped abruptly without medical supervision.

Choice D is wrong because increasing theophylline dosage immediately may cause overdose and adverse effects such as nausea, vomiting, headache, tachycardia, arrhythmias, seizures and even death.

The dose of theophylline should be carefully titrated according to serum levels and clinical response.

A. Desmopressin. B. Methylprednisolone. C. Dexamethasone. D. Physostigmine.

Correct Answer is A

Explanation

Desmopressin Acetate - Amring Pharmaceuticals

Desmopressin is a synthetic analog of antidiuretic hormone (ADH) that acts on the kidneys to increase water reabsorption and decrease urine output. Neurogenic diabetes insipidus is a condition caused by a deficiency of ADH due to damage to the hypothalamus or pituitary gland. Patients with this condition have excessive thirst and urination, dehydration, and low urine specific gravity.

Choice B. Methylprednisolone is wrong because it is a corticosteroid that suppresses inflammation and immune response.

It is not used to treat diabetes insipidus.

Choice C. Dexamethasone is wrong because it is also a corticosteroid that has similar effects as methylprednisolone.

It is not used to treat diabetes insipidus.

Choice D. Physostigmine is wrong because it is a cholinesterase inhibitor that increases the levels of acetylcholine in the body.

It is used to treat myasthenia gravis and anticholinergic poisoning.

It has no effect on diabetes insipidus.

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The nurse is caring for a client with hypothyroidism who has a history of myocardial infarction and heart failure. What thyroid replacement drug would the nurse expect to be ordered?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is caring for a client newly diagnosed with hypothyroidism. The client also takes theophylline to control asthma symptoms. What change may need to be made to the client’s theophylline dose?

Correct Answer is B

Explanation

The nurse is caring for a client with neurogenic diabetes insipidus and administers what drug to treat the condition.

Correct Answer is A

Explanation

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The nurse is caring for a client with hypothyroidism who has a history of myocardial infarction and heart failure.
What thyroid replacement drug would the nurse expect to be ordered?