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?
Decrease theophylline dosage immediately.
Decrease theophylline dose when normal thyroid function returns.
Discontinue the client’s theophylline.
Increase theophylline dosage immediately.
The Correct Answer is B
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Loratadine is a second-generation antihistamine that does not cause drowsiness or sedation as a common side effect. It can relieve the symptoms of seasonal rhinitis such as sneezing, runny nose, and itching.
Choice B. Diphenhydramine is wrong because it is a first-generation antihistamine that can cause drowsiness or sedation as a common side effect.
It can also cause dry mouth, blurred vision, and urinary retention.
Choice C. Hydroxyzine is wrong because it is also a first-generation antihistamine that can cause drowsiness or sedation as a common side effect.
It can also cause dry mouth, blurred vision, and urinary retention.
It is mainly used for anxiety and itching.
Choice D. Dexchlorphen
Correct Answer is B
Explanation
This is because antiemetics should be given to prevent motion sickness rather than after nausea or vomiting develop. Taking the medication 30 minutes before departing allows enough time for the drug to be absorbed and reach its peak effect.
Choice A is wrong because avoiding eating or drinking for 6 hours before the trip may cause dehydration and low blood sugar, which can worsen nausea and vomiting.
It is better to eat a light meal or snack before the trip and avoid spicy, greasy, or acidic foods.
Choice C is wrong because taking two doses if relief is not achieved may cause overdose and adverse effects.
Antiemetics should be taken as prescribed and not exceeded without consulting a doctor.
Choice D is wrong because increasing fluid intake to prevent urinary retention is not relevant for motion sickness.
Urinary retention is a possible side effect of some antiemetics, such as anticholinergics, but it is not a common problem for most people.
Fluid intake should be moderate and not excessive to avoid stomach distension.
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