Dosage Calculation RN Fundamentals
Online Practice Assessment 3.0
Questions And Answers
A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN pain.
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Available is codeine oral solution 10 mg/ 5 mL. How many mL should the nurse
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
administer per dose?
ji ji ji ji
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
trailing zero.) - (correct answer) -Answer: 10 mL
ji ji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mL
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 20 mg
ji ji ji
Step 3: What is the dose available? Dose available = Have 10 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 4: Should the nurse convert the units of measurement? No
ji ji ji ji ji ji ji ji ji ji
Step 5: What is the quantity of the dose available? 5 mL
ji ji ji ji ji ji ji ji ji ji ji
Step 6: Set up an equation and solve for X.
ji ji ji ji ji ji ji ji ji
Have/Quantity = Desired/X ji ji
10 mg/ 5 mL = 20 mg/ X mL
ji ji ji ji ji ji ji ji
X mL = 10 mL
ji ji ji ji
Step 7: Round if necessary.
ji ji ji ji
Step 8: Determine whether the amount to administer makes sense. If there are 10
ji ji ji ji ji ji ji ji ji ji ji ji ji
mg/5 mL and the prescription reads 20 mg, it makes sense to administer 10 mL.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
The nurse should administer codeine oral solution 10 mL PO every 6 hr PRN pain.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
A nurse is preparing to administer eszopiclone 2,000 mcg PO to a client. How
ji ji ji ji ji ji ji ji ji ji ji ji ji
many mg should the nurse administer?
ji ji ji ji ji ji ji
,(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
trailing zero.) - (correct answer) -Answer: 2 mg
ji ji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 2,000 mcg
ji ji ji
Step 3: What is the dose available? Dose available = Have 1 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 4: Should the nurse convert the units of measurement? Yes (mcg does not
ji ji ji ji ji ji ji ji ji ji ji ji ji
equal mg)
ji ji
1,000 mcg/1 mg = 2,000 mcg/X mg
ji ji ji ji ji ji
X mg = 2 mg
ji ji ji ji
Step 5: Round if necessary.
ji ji ji ji
Step 6: Determine whether the amount to administer makes sense. If the
ji ji ji ji ji ji ji ji ji ji ji
prescription reads 2,000 mcg and 1,000 mcg equals 1 mg, it makes sense to
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
administer 2 mg. The nurse should administer eszopiclone 2 mg PO.
ji ji ji ji ji ji ji ji ji ji ji
A nurse is preparing to administer tobramycin 4 mg/kg/day IM divided in three
ji ji ji ji ji ji ji ji ji ji ji ji
equal doses to a patient who weighs 60 kg. Available is tobramycin 40 mg/mL.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
How many mL should the nurse administer per dose?
ji ji ji ji ji ji ji ji ji ji
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
trailing zero.) - (correct answer) -Answer: 2 mL
ji ji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: Set up an equation and solve for X.
ji ji ji ji ji ji ji ji ji
X = Dose per kg × Client's weight in kg
ji ji ji ji ji ji ji ji ji
X mg = 4 mg/kg × 60 kg
ji ji ji ji ji ji ji
, X mg = 240 mg
ji ji ji ji
The dose is divided into three equal doses; therefore, divide X by 3.
ji ji ji ji ji ji ji ji ji ji ji ji
240 mg = 80 mg3 ji ji ji ji
Step 3: What is the unit of measurement the nurse should calculate? mL
ji ji ji ji ji ji ji ji ji ji ji ji
Step 4: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 80 mg
ji ji ji
Step 5: What is the dose available? Dose available = Have 40 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 6: Should the nurse convert the units of measurement? No
ji ji ji ji ji ji ji ji ji ji
Step 7: What is the quantity of the dose available? 1 mL
ji ji ji ji ji ji ji ji ji ji ji
Step 8: Set up an equation and solve for X.
ji ji ji ji ji ji ji ji ji
Have/Quantity = Desired/X ji ji
40 mg/1 mL = 80 mg/X mL
ji ji ji ji ji ji
X mL = 2 mL
ji ji ji ji
Step 9: Round if necessary. ji ji ji ji
Step 10: Determine whether the amount to administer makes sense. If there are
ji ji ji ji ji ji ji ji ji ji ji ji
40 mg/mL and the prescription reads 4 mg/kg/day divided in three equal doses,
ji ji ji ji ji ji ji ji ji ji ji ji ji
it makes sense to administer 2 mL. The nurse should administer tobramycin 2 mL
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
IM per dose.
ji ji ji
A nurse is preparing to administer meperidine 75 mg IM stat. Available is
ji ji ji ji ji ji ji ji ji ji ji ji
meperidine injection 100 mg/mL. How many mL should the nurse administer?
ji ji ji ji ji ji ji ji ji ji ji
ji (Round answer to nearest hundredth. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
ji trailing zero.) - (correct answer) -Answer: 0.75 mLji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mL
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 75 mg
ji ji ji
Step 3: What is the dose available? Dose available = Have 100 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Online Practice Assessment 3.0
Questions And Answers
A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN pain.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
Available is codeine oral solution 10 mg/ 5 mL. How many mL should the nurse
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
administer per dose?
ji ji ji ji
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
trailing zero.) - (correct answer) -Answer: 10 mL
ji ji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mL
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 20 mg
ji ji ji
Step 3: What is the dose available? Dose available = Have 10 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 4: Should the nurse convert the units of measurement? No
ji ji ji ji ji ji ji ji ji ji
Step 5: What is the quantity of the dose available? 5 mL
ji ji ji ji ji ji ji ji ji ji ji
Step 6: Set up an equation and solve for X.
ji ji ji ji ji ji ji ji ji
Have/Quantity = Desired/X ji ji
10 mg/ 5 mL = 20 mg/ X mL
ji ji ji ji ji ji ji ji
X mL = 10 mL
ji ji ji ji
Step 7: Round if necessary.
ji ji ji ji
Step 8: Determine whether the amount to administer makes sense. If there are 10
ji ji ji ji ji ji ji ji ji ji ji ji ji
mg/5 mL and the prescription reads 20 mg, it makes sense to administer 10 mL.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
The nurse should administer codeine oral solution 10 mL PO every 6 hr PRN pain.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
A nurse is preparing to administer eszopiclone 2,000 mcg PO to a client. How
ji ji ji ji ji ji ji ji ji ji ji ji ji
many mg should the nurse administer?
ji ji ji ji ji ji ji
,(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
trailing zero.) - (correct answer) -Answer: 2 mg
ji ji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 2,000 mcg
ji ji ji
Step 3: What is the dose available? Dose available = Have 1 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 4: Should the nurse convert the units of measurement? Yes (mcg does not
ji ji ji ji ji ji ji ji ji ji ji ji ji
equal mg)
ji ji
1,000 mcg/1 mg = 2,000 mcg/X mg
ji ji ji ji ji ji
X mg = 2 mg
ji ji ji ji
Step 5: Round if necessary.
ji ji ji ji
Step 6: Determine whether the amount to administer makes sense. If the
ji ji ji ji ji ji ji ji ji ji ji
prescription reads 2,000 mcg and 1,000 mcg equals 1 mg, it makes sense to
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
administer 2 mg. The nurse should administer eszopiclone 2 mg PO.
ji ji ji ji ji ji ji ji ji ji ji
A nurse is preparing to administer tobramycin 4 mg/kg/day IM divided in three
ji ji ji ji ji ji ji ji ji ji ji ji
equal doses to a patient who weighs 60 kg. Available is tobramycin 40 mg/mL.
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
How many mL should the nurse administer per dose?
ji ji ji ji ji ji ji ji ji ji
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
trailing zero.) - (correct answer) -Answer: 2 mL
ji ji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: Set up an equation and solve for X.
ji ji ji ji ji ji ji ji ji
X = Dose per kg × Client's weight in kg
ji ji ji ji ji ji ji ji ji
X mg = 4 mg/kg × 60 kg
ji ji ji ji ji ji ji
, X mg = 240 mg
ji ji ji ji
The dose is divided into three equal doses; therefore, divide X by 3.
ji ji ji ji ji ji ji ji ji ji ji ji
240 mg = 80 mg3 ji ji ji ji
Step 3: What is the unit of measurement the nurse should calculate? mL
ji ji ji ji ji ji ji ji ji ji ji ji
Step 4: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 80 mg
ji ji ji
Step 5: What is the dose available? Dose available = Have 40 mg
ji ji ji ji ji ji ji ji ji ji ji ji
Step 6: Should the nurse convert the units of measurement? No
ji ji ji ji ji ji ji ji ji ji
Step 7: What is the quantity of the dose available? 1 mL
ji ji ji ji ji ji ji ji ji ji ji
Step 8: Set up an equation and solve for X.
ji ji ji ji ji ji ji ji ji
Have/Quantity = Desired/X ji ji
40 mg/1 mL = 80 mg/X mL
ji ji ji ji ji ji
X mL = 2 mL
ji ji ji ji
Step 9: Round if necessary. ji ji ji ji
Step 10: Determine whether the amount to administer makes sense. If there are
ji ji ji ji ji ji ji ji ji ji ji ji
40 mg/mL and the prescription reads 4 mg/kg/day divided in three equal doses,
ji ji ji ji ji ji ji ji ji ji ji ji ji
it makes sense to administer 2 mL. The nurse should administer tobramycin 2 mL
ji ji ji ji ji ji ji ji ji ji ji ji ji ji
IM per dose.
ji ji ji
A nurse is preparing to administer meperidine 75 mg IM stat. Available is
ji ji ji ji ji ji ji ji ji ji ji ji
meperidine injection 100 mg/mL. How many mL should the nurse administer?
ji ji ji ji ji ji ji ji ji ji ji
ji (Round answer to nearest hundredth. Use a leading zero if it applies. Do not use a
ji ji ji ji ji ji ji ji ji ji ji ji ji ji ji
ji trailing zero.) - (correct answer) -Answer: 0.75 mLji ji ji ji ji ji ji
Follow these steps for the Ratio and Proportion method of calculation:
ji ji ji ji ji ji ji ji ji ji
Step 1: What is the unit of measurement the nurse should calculate? mL
ji ji ji ji ji ji ji ji ji ji ji ji
Step 2: What is the dose the nurse should administer? Dose to administer =
ji ji ji ji ji ji ji ji ji ji ji ji ji
Desired 75 mg
ji ji ji
Step 3: What is the dose available? Dose available = Have 100 mg
ji ji ji ji ji ji ji ji ji ji ji ji
