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WorksheetsU5 Medication Dosage REVIEW
Total questions: 40
Worksheet time: 27mins
What is “dose conversion”?
Changing a drug’s name
Changing a dose form while keeping the same total active ingredient
Rewriting a prescription
Measuring patient height
Who is legally authorized to adjust a prescribed dose?
Pharmacy technician
Prescriber (MD, NP, PA)
Medical assistant
CNA
Which role may calculate a conversion but not alter a prescription?
Pharmacist
Nurse
Pharmacy technician
Patient
Which calculation method relies on conversion factors?
Ratio-proportion
Long division
Dimensional analysis
Scientific notation
A 500 mg tablet is unavailable; suspension = 250 mg/5 mL. How many mL = 500 mg?
5 mL
8 mL
10 mL
12 mL
A Digoxin dose was 10 × too high because of a misplaced decimal. This is an example of:
Unit conversion error
Compounding error
Expiration error
Label error
A nurse entered 25 kg instead of 25 lb. This caused:
Underdosing
Weight-to-dose error
Route error
Allergy reaction
Why must all healthcare workers understand conversions, even if not authorized to perform them?
To catch potential errors before harm
To replace the pharmacist
To order new medications
To handle billing
What lesson is common to all real-life cases presented?
Always double-check calculations and labels
Avoid asking for help
Estimate whenever possible
Skip documentation
The Imperial system is also called the:
Metric system
Apothecary system
Household system
Scientific system
A caregiver gives 1 tbsp instead of 1 tsp. How much extra was given?
2×
3×
4×
½×
A patient drinks “8 cups” instead of “8 oz.” This error =
Underdose
Overdose of fluid
No effect
Wrong route
Which best prevents household measuring errors?
Use medicine cup or syringe
Use kitchen silverware
Estimate by eye
Pour into any container
Which statement about household vs. weight ounces is true?
They are the same
Liquid and weight ounces differ
Household ounces are metric
All liquids weigh the same
Why is the metric system preferred in healthcare?
It uses fractions
It’s based on powers of ten
It uses imperial units
It changes annually
Base unit for weight:
Liter
Gram
Meter
Milliliter
Base metric unit for volume:
Ounce
Pint
Liter
Gallon
How many mg = 1 g?
10
100
1,000
10,000
How many mL = 1 L?
10
100
1,000
10,000
What is the correct decimal movement from g to mg?
Left 3
Right 3
Left 2
Right 1
Convert 0.25 g → mg.
25 mg
250 mg
2,500 mg
0.025 mg
If 2 L IV fluid uses 250 mL bags, how many bags?
6
7
8
9
The symbol μg or mcg represents:
Milligram
Microgram
Milliliter
Meter
1.5 cup = how many mL?
100
180
240
360
2 quart = how many mL?
480
720
960
1920
A dose of 90 mL is ordered. How many tsp ≈ ?
9
12
15
18
Why is accurate conversion critical for pediatric patients?
They metabolize faster
Doses depend on weight
They use imperial only
Parents measure by eye
A nurse administers morphine to a post-operative patient using a vial labeled “10 mg/10 mL.” She assumes the patient should receive 10 mL instead of the prescribed 1 mg dose. What type of medication error occurred?
Decimal placement error
Wrong route error
Concentration miscalculation
Time-of-administration error
A nurse administered 1 tbsp of iron supplement instead of 5 mL. What is the result?
Underdose
3× overdose
No effect
6× overdose
What does NASA’s Mars Orbiter error illustrate?
Unit confusion can cause catastrophic loss
Metric is wrong
Gravity errors
Too little fuel
Which decimal format is safe practice?
5 mg
.5 mg
0.50 mg
5.0 mg
What is a key step when converting measurements between Metric and Imperial systems?
Ignore unit labels
Use correct conversion factors
Always round up
Estimate without calculation
Select all the correct metric conversions for the following imperial volumes: 1 tsp, 1 tbsp, 1 oz, 1 cup.
1 tsp
5 mL
1 tbsp
15 mL
1 oz
30 mL
1 c
240 mL
1 pt
480 mL
Match the following
3840 mL
1 gal
960 mL
1 qt
480 mL
1 pt
240 mL
1 C
120 mL
1/2 C
Dr. Robinson ordered Digoxin 250 mcg. The supply available is 0.125 mg per tablet.
How many tablets will be administered?
0.5 tablets
2 tablets
1 tablet
500 tablets
Anxiety consumed 1 cups of water, 16 fl oz of coffee, and 480 mL of Red Bull. How many mL of fluid did they consume?
750 mL
960 mL
1200 mL
720 mL
Maui is sick with a really bad demigod level cold. Moana recommends he takes 2 oz of honey for his demigodly sore throat.
How many mL is that?
Match the following
po
by mouth
ac
before meals
pc
after meals
bid
two times a day
tid
three times a day
Mirabel from Encanto documents the following intake for her Abuela:
8 oz of coffee at breakfast
350 mL of water mid-morning
1 cup of soup at lunch
1 L of agua fresca at dinner
👉 What is the total mL intake for the day?
1830 mL
1830 oz
1790 mL
1790 oz
Dory needs 15 mL of fish supplement each morning but mistakenly gives herself 15 tsp.
👉 How much more did she take than prescribed (in mL)?
