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 mL"]
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["3 tablets."]
Explanation
We need to calculate how many 0.5 mg tablets are needed to achieve a daily dose of 1.5 mg:
1.5 mg ÷ 0.5 mg/tablet = 3 tablets
Since we are asked to round to the nearest whole number, the final answer is 3 tablets.
Correct Answer is ["2.5 mL"]
Explanation
To determine how many mL of valproic acid syrup the nurse should administer, we need to use a ratio and proportion:
250 mg : 5 mL = 125 mg : x mL Cross-multiplying, we get:
250 mg x x mL = 5 mL x 125 mg Simplifying, we get:
x = (5 mL x 125 mg) / 250 mg x = 2.5 mL
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