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