Dosage Calculation RN Fundamentals
Online Practice Assessment 3.0 with
100% correct and verified answers
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mL
Step 2: What is the dose the nurse should administer? Dose to administer = Desired 75
mg
Step 3: What is the dose available? Dose available = Have 100 mg
Step 4: Should the nurse convert the units of 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 administer famotidine 40 mg PO at bedtime. Available is
famotidine 20 mg/tablet. How many tablets should the nurse administer?
,(Round answer to nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.) - ANSWER: >>>>/Answer: 2 tablets
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? tablet(s)
Step 2: What is the dose the nurse should administer? Dose to administer = Desired
40 mg
Step 3: What is the dose available? Dose available = Have 20 mg
Step 4: Should the nurse convert the units of measurement? No
Step 5: What is the quantity of the dose available? 1 tablet
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
20 mg/ 1 tablet = 40 mg/X tablet(s)
X tablet(s) = 2 tablets
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 20
mg/tablet and the prescription reads 40 mg, it makes sense to administer 2 tablets.
The nurse should administer famotidine 2 tablets PO at bedtime.
A nurse is preparing to administer morphine 4 mg IM. Available is morphine injection
10 mg/mL. How many mL should the nurse administer per dose?
(Round answer to nearest tenth. Use a leading zero if it applies. Do not use a trailing
zero.) - ANSWER: >>>>/Answer: 0.4 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
, Step 2: What is the dose the nurse should administer? Dose to administer = Desired 4
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? 1 mL
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
10 mg / 1 mL =4 mg /X mL
X mL = 0.4 mL
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 10
mg/mL and the prescription reads 4 mg, it makes sense to administer 0.4 mL. The
nurse should administer morphine 0.4 mL IM.
A nurse is preparing to administer 750,000 units of procaine penicillin G IM. Available
is procaine penicillin G injection 600,000 units/mL. How many mL should the nurse
administer per dose?
(Round answer to nearest tenth. Use a leading zero if it applies. Do not use a trailing
zero.) - ANSWER: >>>>/Answer: 1.3 mL
A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN pain. Available
is codeine oral solution 10 mg/ 5 mL. How many mL should the nurse administer per
dose?
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.) - ANSWER: >>>>/Answer: 10 mL
Follow these steps for the Ratio and Proportion method of calculation:
Online Practice Assessment 3.0 with
100% correct and verified answers
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? mL
Step 2: What is the dose the nurse should administer? Dose to administer = Desired 75
mg
Step 3: What is the dose available? Dose available = Have 100 mg
Step 4: Should the nurse convert the units of 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 administer famotidine 40 mg PO at bedtime. Available is
famotidine 20 mg/tablet. How many tablets should the nurse administer?
,(Round answer to nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.) - ANSWER: >>>>/Answer: 2 tablets
Follow these steps for the Ratio and Proportion method of calculation:
Step 1: What is the unit of measurement the nurse should calculate? tablet(s)
Step 2: What is the dose the nurse should administer? Dose to administer = Desired
40 mg
Step 3: What is the dose available? Dose available = Have 20 mg
Step 4: Should the nurse convert the units of measurement? No
Step 5: What is the quantity of the dose available? 1 tablet
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
20 mg/ 1 tablet = 40 mg/X tablet(s)
X tablet(s) = 2 tablets
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 20
mg/tablet and the prescription reads 40 mg, it makes sense to administer 2 tablets.
The nurse should administer famotidine 2 tablets PO at bedtime.
A nurse is preparing to administer morphine 4 mg IM. Available is morphine injection
10 mg/mL. How many mL should the nurse administer per dose?
(Round answer to nearest tenth. Use a leading zero if it applies. Do not use a trailing
zero.) - ANSWER: >>>>/Answer: 0.4 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
, Step 2: What is the dose the nurse should administer? Dose to administer = Desired 4
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? 1 mL
Step 6: Set up an equation and solve for X.
Have/Quantity = Desired/X
10 mg / 1 mL =4 mg /X mL
X mL = 0.4 mL
Step 7: Round if necessary.
Step 8: Determine whether the amount to administer makes sense. If there are 10
mg/mL and the prescription reads 4 mg, it makes sense to administer 0.4 mL. The
nurse should administer morphine 0.4 mL IM.
A nurse is preparing to administer 750,000 units of procaine penicillin G IM. Available
is procaine penicillin G injection 600,000 units/mL. How many mL should the nurse
administer per dose?
(Round answer to nearest tenth. Use a leading zero if it applies. Do not use a trailing
zero.) - ANSWER: >>>>/Answer: 1.3 mL
A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN pain. Available
is codeine oral solution 10 mg/ 5 mL. How many mL should the nurse administer per
dose?
(Round to the nearest whole number. Use a leading zero if it applies. Do not use a
trailing zero.) - ANSWER: >>>>/Answer: 10 mL
Follow these steps for the Ratio and Proportion method of calculation:
