ATI DosAge CAlCulATIon - Pn ComPrehensIve revIew PrACTICAl
nursIng (Pn) meDICATIon mATh exAmInATIon exAm
2026||||quesTIons AnD Answers wITh rATIonAles/grADeD
A+/2026 uPDATe/100% CorreCT /InsTAnT DownloAD
SECTION 1: BASIC ORAL MEDICATION CALCULATIONS (Questions 1-12)
**Question 1**
A nurse is preparing to administer acetaminophen 650 mg PO. The medication is
available as 325 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:** Formula: Desired dose ÷ Available dose = Number of tablets. 650 mg ÷
325 mg = 2 tablets. Always verify the medication against the MAR three times before
administration.
---
**Question 2**
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:** 25 mg ÷ 50 mg = 0.5 tablet. When splitting tablets, ensure the tablet is
scored and safe to split. Some extended-release medications cannot be split.
---
**Question 3**
A nurse is preparing to administer amoxicillin 500 mg PO. Available is amoxicillin 250
mg/5 mL suspension. How many mL should the nurse administer?
A) 5 mL
B) 7.5 mL
C) 10 mL
D) 12.5 mL
**Answer:** C) 10 mL
**Rationale:** First find concentration: 250 mg ÷ 5 mL = 50 mg/mL. Then 500 mg ÷ 50
mg/mL = 10 mL. Alternatively, use ratio: 250 mg/5 mL = 500 mg/x mL → 250x = 2500 → x
= 10 mL.
---
, **Question 4**
A nurse is preparing to administer digoxin 0.125 mg PO. Available is digoxin 0.25 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:** 0.125 mg ÷ 0.25 mg = 0.5 tablet. Digoxin is a high-alert medication;
double-check calculation with another nurse.
---
**Question 5**
A nurse is preparing to administer furosemide 40 mg PO. Available is furosemide 20 mg
tablets. How many tablets should the nurse administer?
A) 1 tablet
B) 2 tablets
C) 3 tablets
D) 4 tablets
**Answer:** B) 2 tablets
**Rationale:** 40 mg ÷ 20 mg = 2 tablets. Furosemide is a diuretic that can cause
electrolyte imbalances; monitor potassium levels.
nursIng (Pn) meDICATIon mATh exAmInATIon exAm
2026||||quesTIons AnD Answers wITh rATIonAles/grADeD
A+/2026 uPDATe/100% CorreCT /InsTAnT DownloAD
SECTION 1: BASIC ORAL MEDICATION CALCULATIONS (Questions 1-12)
**Question 1**
A nurse is preparing to administer acetaminophen 650 mg PO. The medication is
available as 325 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:** Formula: Desired dose ÷ Available dose = Number of tablets. 650 mg ÷
325 mg = 2 tablets. Always verify the medication against the MAR three times before
administration.
---
**Question 2**
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:** 25 mg ÷ 50 mg = 0.5 tablet. When splitting tablets, ensure the tablet is
scored and safe to split. Some extended-release medications cannot be split.
---
**Question 3**
A nurse is preparing to administer amoxicillin 500 mg PO. Available is amoxicillin 250
mg/5 mL suspension. How many mL should the nurse administer?
A) 5 mL
B) 7.5 mL
C) 10 mL
D) 12.5 mL
**Answer:** C) 10 mL
**Rationale:** First find concentration: 250 mg ÷ 5 mL = 50 mg/mL. Then 500 mg ÷ 50
mg/mL = 10 mL. Alternatively, use ratio: 250 mg/5 mL = 500 mg/x mL → 250x = 2500 → x
= 10 mL.
---
, **Question 4**
A nurse is preparing to administer digoxin 0.125 mg PO. Available is digoxin 0.25 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:** 0.125 mg ÷ 0.25 mg = 0.5 tablet. Digoxin is a high-alert medication;
double-check calculation with another nurse.
---
**Question 5**
A nurse is preparing to administer furosemide 40 mg PO. Available is furosemide 20 mg
tablets. How many tablets should the nurse administer?
A) 1 tablet
B) 2 tablets
C) 3 tablets
D) 4 tablets
**Answer:** B) 2 tablets
**Rationale:** 40 mg ÷ 20 mg = 2 tablets. Furosemide is a diuretic that can cause
electrolyte imbalances; monitor potassium levels.
