Dosage Calculation RN Fundamentals Online Practice Assessment 3.0
Study online at https://quizlet.com/_9mpgcr
1. A nurse is preparing to administer codeine Answer: 10 mL
20 mg PO every 6 hr PRN pain. Available is
codeine oral solution 10 mg/ 5 mL. How many Follow these steps for the Ratio and
mL should the nurse administer per dose? Proportion method of calculation:
Step 1: What is the unit of measure-
(Round to the nearest whole number. Use a ment the nurse should calculate? mL
leading zero if it applies. Do not use a trailing Step 2: What is the dose the nurse
zero.) should administer? Dose to administer
= Desired 20 mg
Step 3: What is the dose available?
Dose available = Have 10 mg
Step 4: Should the nurse convert the
units of measurement? No
Step 5: What is the quantity of the dose
available? 5 mL
Step 6: Set up an equation and solve
for X.
Have/Quantity = Desired/X
10 mg/ 5 mL = 20 mg/ X mL
X mL = 10 mL
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.
2. A nurse is preparing to administer eszopiclone Answer: 2 mg
2,000 mcg PO to a client. How many mg should
the nurse administer? Follow these steps for the Ratio and
, Dosage Calculation RN Fundamentals Online Practice Assessment 3.0
Study online at https://quizlet.com/_9mpgcr
Proportion method of calculation:
(Round to the nearest whole number. Use a Step 1: What is the unit of measure-
leading zero if it applies. Do not use a trailing ment the nurse should calculate? mg
zero.) Step 2: What is the dose the nurse
should administer? Dose to administer
= Desired 2,000 mcg
Step 3: What is the dose available?
Dose available = Have 1 mg
Step 4: Should the nurse convert the
units of measurement? Yes (mcg does
not equal mg)
1,000 mcg/1 mg = 2,000 mcg/X mg
X mg = 2 mg
Step 5: Round if necessary.
Step 6: Determine whether the amount
to administer makes sense. If the pre-
scription reads 2,000 mcg and 1,000
mcg equals 1 mg, it makes sense to
administer 2 mg. The nurse should ad-
minister eszopiclone 2 mg PO.
3. A nurse is preparing to administer tobramycin Answer: 2 mL
4 mg/kg/day IM divided in three equal doses
to a patient who weighs 60 kg. Available is Follow these steps for the Ratio and
tobramycin 40 mg/mL. How many mL should Proportion method of calculation:
the nurse administer per dose? Step 1: What is the unit of measure-
ment the nurse should calculate? mg
(Round to the nearest whole number. Use a Step 2: Set up an equation and solve
leading zero if it applies. Do not use a trailing for X.
zero.) X = Dose per kg × Client's weight in kg
X mg = 4 mg/kg × 60 kg
X mg = 240 mg
, Dosage Calculation RN Fundamentals Online Practice Assessment 3.0
Study online at https://quizlet.com/_9mpgcr
The dose is divided into three equal
doses; therefore, divide X by 3.
240 mg = 80 mg3
Step 3: What is the unit of measure-
ment the nurse should calculate? mL
Step 4: What is the dose the nurse
should administer? Dose to administer
= Desired 80 mg
Step 5: What is the dose available?
Dose available = Have 40 mg
Step 6: Should the nurse convert the
units of measurement? No
Step 7: What is the quantity of the dose
available? 1 mL
Step 8: Set up an equation and solve
for X.
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 pre-
scription reads 4 mg/kg/day divided in
three equal doses, it makes sense to
administer 2 mL. The nurse should ad-
minister tobramycin 2 mL IM per dose.
4. A nurse is preparing to administer meperidine Answer: 0.75 mL
75 mg IM stat. Available is meperidine injec-
tion 100 mg/mL. How many mL should the Follow these steps for the Ratio and
nurse administer? Proportion method of calculation:
Study online at https://quizlet.com/_9mpgcr
1. A nurse is preparing to administer codeine Answer: 10 mL
20 mg PO every 6 hr PRN pain. Available is
codeine oral solution 10 mg/ 5 mL. How many Follow these steps for the Ratio and
mL should the nurse administer per dose? Proportion method of calculation:
Step 1: What is the unit of measure-
(Round to the nearest whole number. Use a ment the nurse should calculate? mL
leading zero if it applies. Do not use a trailing Step 2: What is the dose the nurse
zero.) should administer? Dose to administer
= Desired 20 mg
Step 3: What is the dose available?
Dose available = Have 10 mg
Step 4: Should the nurse convert the
units of measurement? No
Step 5: What is the quantity of the dose
available? 5 mL
Step 6: Set up an equation and solve
for X.
Have/Quantity = Desired/X
10 mg/ 5 mL = 20 mg/ X mL
X mL = 10 mL
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.
2. A nurse is preparing to administer eszopiclone Answer: 2 mg
2,000 mcg PO to a client. How many mg should
the nurse administer? Follow these steps for the Ratio and
, Dosage Calculation RN Fundamentals Online Practice Assessment 3.0
Study online at https://quizlet.com/_9mpgcr
Proportion method of calculation:
(Round to the nearest whole number. Use a Step 1: What is the unit of measure-
leading zero if it applies. Do not use a trailing ment the nurse should calculate? mg
zero.) Step 2: What is the dose the nurse
should administer? Dose to administer
= Desired 2,000 mcg
Step 3: What is the dose available?
Dose available = Have 1 mg
Step 4: Should the nurse convert the
units of measurement? Yes (mcg does
not equal mg)
1,000 mcg/1 mg = 2,000 mcg/X mg
X mg = 2 mg
Step 5: Round if necessary.
Step 6: Determine whether the amount
to administer makes sense. If the pre-
scription reads 2,000 mcg and 1,000
mcg equals 1 mg, it makes sense to
administer 2 mg. The nurse should ad-
minister eszopiclone 2 mg PO.
3. A nurse is preparing to administer tobramycin Answer: 2 mL
4 mg/kg/day IM divided in three equal doses
to a patient who weighs 60 kg. Available is Follow these steps for the Ratio and
tobramycin 40 mg/mL. How many mL should Proportion method of calculation:
the nurse administer per dose? Step 1: What is the unit of measure-
ment the nurse should calculate? mg
(Round to the nearest whole number. Use a Step 2: Set up an equation and solve
leading zero if it applies. Do not use a trailing for X.
zero.) X = Dose per kg × Client's weight in kg
X mg = 4 mg/kg × 60 kg
X mg = 240 mg
, Dosage Calculation RN Fundamentals Online Practice Assessment 3.0
Study online at https://quizlet.com/_9mpgcr
The dose is divided into three equal
doses; therefore, divide X by 3.
240 mg = 80 mg3
Step 3: What is the unit of measure-
ment the nurse should calculate? mL
Step 4: What is the dose the nurse
should administer? Dose to administer
= Desired 80 mg
Step 5: What is the dose available?
Dose available = Have 40 mg
Step 6: Should the nurse convert the
units of measurement? No
Step 7: What is the quantity of the dose
available? 1 mL
Step 8: Set up an equation and solve
for X.
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 pre-
scription reads 4 mg/kg/day divided in
three equal doses, it makes sense to
administer 2 mL. The nurse should ad-
minister tobramycin 2 mL IM per dose.
4. A nurse is preparing to administer meperidine Answer: 0.75 mL
75 mg IM stat. Available is meperidine injec-
tion 100 mg/mL. How many mL should the Follow these steps for the Ratio and
nurse administer? Proportion method of calculation:
