A nurse is providing discharge teaching to the parent of child who is prescribed diphenhydramine 75 mg elixir every 4 hr as needed. The amount available is diphenhydramine elixir 25 mg/2.5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["7.5"]
Determine the desired dose.
The nurse needs to administer 75 mg of diphenhydramine.
Calculate the available dose per 2.5 mL.
The available diphenhydramine is 25 mg/2.5 mL.
Calculate the volume to be administered.
Volume = Desired dose (mg) / Concentration (mg/2.5 mL) = 75 mg / (25 mg/2.5 mL) = 75 mg x (2.5 mL/25 mg) = 7.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["48"]
Explanation
The patient has a new prescription for:
16 units of regular insulin daily
32 units of NPH insulin subcutaneously at breakfast
To calculate the total number of units the nurse should prepare in the insulin syringe, we need to add the units of each type of insulin:
Total units = Regular insulin units + NPH insulin units Total units = 16 units + 32 units Total units = 48 units
Correct Answer is ["2"]
Explanation
Determine the desired dose.
The nurse needs to administer 40 mg of acetaminophen.
Calculate the available dose per 2.5 mL.
The available acetaminophen is 10 mg/2.5 mL.
Calculate the volume to be administered.
Volume = Desired dose (mg) / Concentration (mg/2.5 mL) = 40 mg / (10 mg/2.5 mL) = 40 mg x (2.5 mL/10 mg) = 10 mL
Convert mL to teaspoons.
1 teaspoon (tsp) is approximately equal to 5 mL.
Number of teaspoons = Volume (mL) / Volume per teaspoon (mL/tsp) = 10 mL / 5 mL/tsp = 2 tsp
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