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