A nurse is preparing to administer diphenhydramine 1.25 mg/kg IM to a child who weighs 68 lb. Available is diphenhydramine injection 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.8"]
First, the child's weight needs to be converted from pounds to kilograms. There are approximately 2.2 pounds in 1 kilogram.
68 lb ÷ 2.2 = 30.9 kg
Next, the dose of diphenhydramine in mg can be calculated by multiplying the child's weight in kg by the dose in mg/kg.
1.25 mg/kg × 30.9 kg = 38.6 mg
Finally, to calculate the number of mL the nurse should administer, you need to divide the dose of diphenhydramine in mg by the concentration of the diphenhydramine injection in mg/mL.
38.6 mg ÷ 50 mg/mL = 0.8 mL
So, the nurse should administer 0.8 mL of diphenhydramine injection.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Answer: D. with "EP116" stamped on one side of the tablet.
Rationale:
A. As a round, white tablet:
While furosemide may come in white tablet form, this description alone is not specific enough to identify the correct medication. Multiple medications can appear as round white tablets, so this option lacks distinguishing detail.
B. As a multicolored capsule:
Furosemide 20 mg is not typically manufactured as a multicolored capsule. This appearance is more commonly associated with other medications, and using this could increase the risk of medication administration error.
C. with Furosemide 20 mg printed on the side of the capsule:
Furosemide tablets are usually stamped with manufacturer-specific codes, not printed with the full name and dosage. Capsules with this exact labeling are not standard for furosemide 20 mg.
D. with "EP116" stamped on one side of the tablet:
This is the specific imprint used to identify furosemide 20 mg tablets. The imprint “EP116” confirms the correct drug and dose and is used to verify medication identity before administration.
Correct Answer is ["0.9"]
Explanation
First, you need to convert the client's weight from pounds to kilograms. There are approximately 2.2 pounds in 1 kilogram, so 99 lb / 2.2 = 45 kg. The dose of morphine is 0.2 mg/kg, so for a client who weighs 45 kg, the dose would be 0.2 mg/kg * 45 kg = 9 mg. To calculate the number of mL the nurse should administer, you need to divide the dose of morphine (9 mg) by the concentration of the morphine injection (10 mg/mL). This gives you 9 mg / (10 mg/mL) = 0.9 mL. When rounded to the nearest tenth, this remains
0.9 mL. So, the nurse should administer 0.9 mL of morphine injection.
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