A nurse is preparing to administer diphenhydramine 25 mg PO every 6 hours to an older adult patient who has rhinitis.
The available medication is diphenhydramine syrup 12.5 mg/5 mL. How many mL should the nurse administer?
5 mL.
10 mL.
15 mL.
20 mL.
The Correct Answer is B
Choice A rationale
Administering 5 mL of the available medication would only provide 12.5 mg of diphenhydramine, which is half the required dose. Therefore, this is not the correct choice.
Choice B rationale
The available medication is diphenhydramine syrup 12.5 mg/5 mL. To administer the required dose of 25 mg, the nurse would need to give 10 mL of the syrup. This is because 25 mg (required dose) divided by 12.5 mg (dose per 5 mL) equals 2. Therefore, 2 times 5 mL equals 10 mL. This is the correct choice as it provides the exact required dose.
Choice C rationale
Administering 15 mL of the available medication would provide 37.5 mg of diphenhydramine, which is more than the required dose. Therefore, this is not the correct choice.
Choice D rationale
Administering 20 mL of the available medication would provide 50 mg of diphenhydramine, which is double the required dose. Therefore, this is not the correct choice.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Glaucoma is a contraindication for taking propranolol. Propranolol is a non-selective beta- blocker that can decrease intraocular pressure, which could worsen glaucoma.
Choice B rationale
DeBou syndrome is not a recognized medical condition and therefore cannot be a contraindication for taking propranolol.
Choice C rationale
Migraine headaches are not a contraindication for taking propranolol. In fact, propranolol is often used in the prevention of migraines.
Choice D rationale
A history of kidney stones is not a contraindication for taking propranolol. Propranolol does not affect kidney stone formation or exacerbate this condition.
Correct Answer is B
Explanation
Choice A rationale
While it’s important to prepare for a colonoscopy by cleaning out the colon, drinking full liquids until 6 hours before the procedure may not be recommended. The colon needs to be empty to allow the doctor to view it clearly during the colonoscopy. Therefore, this choice is incorrect.
Choice B rationale
Moderate sedation is often used during a colonoscopy. This means you’ll be relaxed and somewhat drowsy, but you’ll still be awake. You might not remember much about the actual procedure because of the sedative. Therefore, this choice is correct.
Choice C rationale
During a colonoscopy, you will likely start by lying on your left side. However, you may be asked to adjust your position during the procedure to allow the doctor to better examine certain parts of your colon. Therefore, this choice is incorrect.
Choice D rationale
Warming the liquid bowel preparation before drinking it is not typically recommended. The bowel preparation involves drinking a solution that helps clear out the colon, but it doesn’t need to be warmed. Therefore, this choice is incorrect.
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