ATI DosAge CAlCulATIon Rn PRACTICe exAm
ComPRehensIve PRACTICe exAm 2026||||quesTIons AnD
AnsweRs wITh RATIonAles/gRADeD A+/2026 uPDATe/100%
CoRReCT /InsTAnT DownloAD
SECTION 1: BASIC DOSAGE CALCULATIONS (Questions 1-10)
**Question 1**
A nurse is preparing to administer digoxin 0.25 mg PO daily. The medication is available
as 0.125 mg per tablet. How many tablets should the nurse administer?
A) 0.5 tablet
B) 1 tablet
C) 2 tablets
D) 3 tablets
**Answer:** C) 2 tablets
**Rationale:** Use the formula: Desired dose ÷ Available dose = Number of tablets.
0.25 mg ÷ 0.125 mg = 2 tablets. Always verify that the desired dose and available dose
are in the same unit (both mg). Double-check calculations for high-alert medications
like digoxin.
---
**Question 2**
,A nurse is preparing to administer furosemide 40 mg IV push. Available is furosemide
10 mg/mL. How many mL should the nurse administer?
A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL
**Answer:** D) 4 mL
**Rationale:** Desired dose (40 mg) ÷ Concentration (10 mg/mL) = Volume (mL). 40 ÷
10 = 4 mL. Remember to check the administration rate for IV push medications (e.g.,
furosemide is typically given over 1-2 minutes).
---
**Question 3**
A nurse is preparing to administer morphine sulfate 4 mg IV push. Available is morphine
10 mg/mL. How many mL should the nurse administer?
A) 0.2 mL
B) 0.4 mL
C) 2.5 mL
D) 4 mL
**Answer:** B) 0.4 mL
**Rationale:** Desired dose (4 mg) ÷ Concentration (10 mg/mL) = Volume (mL). 4 ÷ 10 =
0.4 mL. For small volumes (less than 1 mL), use a tuberculin syringe for accurate
measurement.
, ---
**Question 4**
A nurse is preparing to administer metoprolol 25 mg PO. Available is metoprolol 50 mg
tablets. How many tablets should the nurse administer?
A) 0.25 tablet
B) 0.5 tablet
C) 1 tablet
D) 2 tablets
**Answer:** B) 0.5 tablet
**Rationale:** Desired dose (25 mg) ÷ Available dose (50 mg) = 0.5 tablet. When
scoring tablets, ensure the tablet can be safely split (some extended-release
medications cannot be split).
---
**Question 5**
A nurse is preparing to administer heparin 5,000 units subcutaneously. Available is
heparin 10,000 units/mL. How many mL should the nurse administer?
A) 0.2 mL
B) 0.5 mL
C) 1 mL
D) 2 mL
**Answer:** B) 0.5 mL
ComPRehensIve PRACTICe exAm 2026||||quesTIons AnD
AnsweRs wITh RATIonAles/gRADeD A+/2026 uPDATe/100%
CoRReCT /InsTAnT DownloAD
SECTION 1: BASIC DOSAGE CALCULATIONS (Questions 1-10)
**Question 1**
A nurse is preparing to administer digoxin 0.25 mg PO daily. The medication is available
as 0.125 mg per tablet. How many tablets should the nurse administer?
A) 0.5 tablet
B) 1 tablet
C) 2 tablets
D) 3 tablets
**Answer:** C) 2 tablets
**Rationale:** Use the formula: Desired dose ÷ Available dose = Number of tablets.
0.25 mg ÷ 0.125 mg = 2 tablets. Always verify that the desired dose and available dose
are in the same unit (both mg). Double-check calculations for high-alert medications
like digoxin.
---
**Question 2**
,A nurse is preparing to administer furosemide 40 mg IV push. Available is furosemide
10 mg/mL. How many mL should the nurse administer?
A) 1 mL
B) 2 mL
C) 3 mL
D) 4 mL
**Answer:** D) 4 mL
**Rationale:** Desired dose (40 mg) ÷ Concentration (10 mg/mL) = Volume (mL). 40 ÷
10 = 4 mL. Remember to check the administration rate for IV push medications (e.g.,
furosemide is typically given over 1-2 minutes).
---
**Question 3**
A nurse is preparing to administer morphine sulfate 4 mg IV push. Available is morphine
10 mg/mL. How many mL should the nurse administer?
A) 0.2 mL
B) 0.4 mL
C) 2.5 mL
D) 4 mL
**Answer:** B) 0.4 mL
**Rationale:** Desired dose (4 mg) ÷ Concentration (10 mg/mL) = Volume (mL). 4 ÷ 10 =
0.4 mL. For small volumes (less than 1 mL), use a tuberculin syringe for accurate
measurement.
, ---
**Question 4**
A nurse is preparing to administer metoprolol 25 mg PO. Available is metoprolol 50 mg
tablets. How many tablets should the nurse administer?
A) 0.25 tablet
B) 0.5 tablet
C) 1 tablet
D) 2 tablets
**Answer:** B) 0.5 tablet
**Rationale:** Desired dose (25 mg) ÷ Available dose (50 mg) = 0.5 tablet. When
scoring tablets, ensure the tablet can be safely split (some extended-release
medications cannot be split).
---
**Question 5**
A nurse is preparing to administer heparin 5,000 units subcutaneously. Available is
heparin 10,000 units/mL. How many mL should the nurse administer?
A) 0.2 mL
B) 0.5 mL
C) 1 mL
D) 2 mL
**Answer:** B) 0.5 mL
