Dosage Calculation: Medication
Administration
1. A nurse is preparing to administer dextrose 5% in water 2L to infuse over 6hr.
The nurse should administer how many mL?
a. 1L=1000mL
b. XmL=1000mL/1L x 2L
c. X=2000mL
2. A nurse is preparing a medication
S
calculates the dosages as 0.547mL. How
many mL should the nurse administer?
a. 0.55mL
b. When rounding doses less than 1, round to the 100th. If the # in the 1000th’s
place is equal to or greater than 5, round up by adding 1 to the # to the left,
the 100th’s place. 0.547 rounds to 0.55mL.
3. A nurse is preparing to administer Benadryl 25mg PO every 12hr. Available is
syrup 12.5mg/5mL. How many tsp should the nurse administer per dose? Round
to the nearest whole #.
a. Step 1: tsp is the unit of measurement
b. Step 2: what quantity of the dose is available? 5mL
c. Step 3: What is the dose available? 12.5mg
d. Step 4: What is the dose needed? 25mg
e. Step 5: Convert units. 1tsp/5mL
f. Step 6: Set up an equation
i. X= quantity/have x conversion (have)/conversion(desired) x desired
ii. X tsp= 5mL/12.5mg x 1tsp/5mL x 25mg
iii. X=2
iv. Round if necessary
4. A nurse is preparing to give Lanoxin 0.125mg PO at 9:00am. What time should
the nurse give the med?
a. 0900
5. A nurse is about to give Lasix 40mg PO in 0.5oz OJ. How many mL of OJ should
the nurse give?
a. Step 1: Identify equivalent: 1oz= 30mL
b. Set up an equation S solve for X.
i. X mL= 30mL/1oz. x 0.5oz
ii. X=15
6. A nurse is about to give Adrenalin Chloride 0.5mg subcutaneous stat. How
many mcg should the nurse give?
a. Equivalent: 1mg= 1000mcg
b. Set up equation S solve for X
i. X mcg= 1000mcg/1mg x 0.5mg
ii. X= 500mcg
7. A nurse is about to give 0.9% NaCl 25000mL to infuse over 12hr. The nurse
should administer how many L?
a. Equivalent: 1000mL= 1L
b. X L= 1L/1000mL x 2500mL
c. X= 2.5L
8. A nurse is about to give regular insulin (Humulin R) 15 units
S
isophane insulin
(Humulin N) 40 units subcutaneous 6.30am. What time should the nurse give
