The client is 34 years old and has recently started taking theophylline.
The nurse knows that medication teaching has been successful when the client agrees to what activity?
Eating foods high in potassium.
Avoiding beverages that contain caffeine.
Taking the medication on an empty stomach.
Limiting fluid intake to 1,000 mL a day.
The Correct Answer is B
It works by relaxing the smooth muscles of the airways and increasing airflow to the lungs.
However, theophylline has a narrow therapeutic range and can cause side effects such as nausea, vomiting, insomnia, tremors, and cardiac arrhythmias if the blood level is too high.
Caffeine is a stimulant that can increase the effects of theophylline and raise the risk of toxicity.
Therefore, patients taking theophylline should avoid caffeine-containing beverages such as coffee, tea, cola, and energy drinks.
Choice A is wrong because eating foods high in potassium has no effect on theophylline metabolism or action.
Potassium is an electrolyte that is important for nerve and muscle function, but it does not interact with theophylline.
Choice C is wrong because taking the medication on an empty stomach can increase the absorption of theophylline and cause gastric irritation.
Theophylline should be taken with food or milk to reduce stomach upset and prevent fluctuations in blood levels.
Choice D is wrong because limiting fluid intake to 1,000 mL a day can cause dehydration and increase the concentration of theophylline in the blood.
Theophylline
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Glargine is a long-acting insulin that can provide a steady level of insulin for up to 24 hours. This would be suitable for a client who does not want to administer insulin on the plane, as they would only need one injection per day.
Choice A. Aspart is wrong because aspart is a rapid-acting insulin that has a peak effect within 1 to 3 hours and lasts for 3 to 5 hours.
This would require frequent injections and monitoring of blood glucose levels.
Choice B. Lispro is wrong because lispro is also a rapid-acting insulin that has a similar onset and duration as aspart.
It would not provide adequate coverage for a long international flight.
Choice C. Glulisine is wrong because glulisine is another rapid-acting insulin that has an onset of 15 minutes and a duration of 2 to 4 hours.
It would also require multiple injections and frequent blood glucose checks.
Normal ranges for blood glucose levels are 70 to 130 mg/dL before meals and less than 180 mg/dL after meals.
Correct Answer is A
Explanation
Tolbutamide is preferred for clients with renal dysfunction, who may not be able to excrete chlorpropamide, because it is more easily cleared from the body.
Choice B. Tolazamide is wrong because it is a first-generation sulfonylurea that is used less frequently and is usually tried after tolbutamide and chlorpropamide have been shown to be ineffective.
Choice C. Chlorpropamide is wrong because it is a first-generation sulfonylurea that may accumulate in clients with renal dysfunction and cause hypoglycemia.
Choice D. Chlorpromazine is wrong because it is an antipsychotic agent, not an oral antidiabetic agent.
First-generation sulfonylureas are oral antidiabetic agents that stimulate insulin secretion from the pancreas.
They are used to treat type 2 diabetes mellitus.
The normal range of blood glucose level is 70 to 110 mg/dL.
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