A nurse is preparing to administer phenytoin 75 mg PO. Available is phenytoin suspension 25 mg/5 mL. How many mL should the nurse administer?
(Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["15"]
Step 1: Determine how many milligrams are in each milliliter of the suspension.
- Total milligrams ÷ Total milliliters
- 25 mg ÷ 5 mL = 5 mg/mL
Step 2: Determine how many milliliters are needed to administer 75 mg.
- Desired milligrams ÷ Milligrams per milliliter
- 75 mg ÷ 5 mg/mL = 15 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["7.5"]
Explanation
Step 1 sets up the equation: (20 mEq ÷ 40 mEq) × 15 mL.
Step 2 is to perform the division: 0.5 × 15 mL.
Step 3 is to perform the multiplication: of 7.5 mL.
So, the correct answer is 7.5 mL.
Correct Answer is ["6"]
Explanation
Step 1 is to determine the amount of haloperidol lactate that needs to be administered, which is 12 mg.
Step 2 is to calculate the volume of the haloperidol oral solution needed to deliver this dose. This is done using the formula:
Dose (mg) ÷ Concentration (mg/mL)
Given that the available concentration is 2 mg/mL, we calculate:
12 mg ÷ 2 mg/mL = 6 mL
Therefore, the nurse should administer 6 mL of the haloperidol oral solution.
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