The nurse is reviewing medication prescriptions.
Which is an appropriate dosage and frequency of cimetidine?
800 mg PO at bedtime.
150 mg PO b.i.d.
20 mg PO b.i.d.
300 mg PO at bedtime.
The Correct Answer is A
800 mg PO at bedtime is an appropriate dosage and frequency of cimetidine for the treatment of gastric ulcer. Cimetidine is a histamine H antagonist that reduces the secretion of gastric acid.
Choice B is wrong because 150 mg PO b.i.d. is too low of a dose for cimetidine. The usual adult dose for duodenal ulcer is 800 mg PO once a day at bedtime or 300 mg PO four times a day.
Choice C is wrong because 20 mg PO b.i.d. is not a valid dose for cimetidine.
The lowest available tablet strength is 100 mg.
Choice D is wrong because 300 mg PO at bedtime is also too low of a dose for cimetidine.
The usual adult dose for gastric ulcer is 800 mg PO once a day at bedtime or 300 mg PO four times a day.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
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
Correct Answer is B
Explanation
Metoclopramide is a medication that increases muscle contractions in the upper digestive tract and speeds up the rate at which the stomach empties into the intestines. It is used to treat gastroparesis (slow stomach emptying) in people with diabetes, which can cause heartburn and stomach discomfort after meals.
Choice A is wrong because impaction is a condition where a large mass of dry, hard stool becomes stuck in the rectum and cannot be passed.
Metoclopramide does not treat impaction, but laxatives or enemas may be used instead.
Choice C is wrong because encopresis is a condition where a child over the age of 4 has involuntary bowel movements, usually due to chronic constipation.
Metoclopramide does not treat encopresis, but behavioral therapy, laxatives, or dietary changes may be used instead.
Choice D is wrong because metoclopramide is not used for clients requiring diagnostic procedures involving the stomach or intestines.
However, it may be used to prevent nausea and vomiting caused by chemotherapy or surgery.
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