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 A
Explanation
Glycerin suppositories are safe and effective for infants with constipation. They work by lubricating and softening the stool, and stimulating the rectal muscles to contract.
Choice B is wrong because magnesium hydroxide is not recommended for infants under 6 months of age, and may cause diarrhea, electrolyte imbalance, or magnesium toxicity.
Choice Cis wrong because watchful waiting for 24 hours may not be enough to relieve the infant’s discomfort and may lead to further complications such as fecal impaction or dehydration.
Choice Dis wrong because feeding supplementation with free water may not be sufficient to treat constipation, and may dilute the infant’s intake of nutrients and electrolytes.
Correct Answer is B
Explanation
This is because teriparatide affects calcium and phosphorus metabolism in a pattern consistent with the known actions of endogenous PTH (eg, increases serum calcium and decreases serum phosphorus)12.
Choice A is wrong because teriparatide does not decrease serum calcium, but increases it.
Choice C is wrong because teriparatide does not increase serum phosphorus, but decreases it.
Choice D is wrong because teriparatide does not decrease serum calcium, but increases it.
Normal ranges for serum calcium are 8.5 to 10.2 mg/dL and for serum phosphorus are 2.5 to 4.5 mg/dL.
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