BSN HESI 215 Dosage Calculation Exam Review
(Latest 2026/2027) – Practice Problems, Formulas
& Step-by-Step Solutions | Nursing Math Mastery
SECTION 1 – ORAL & BASIC PARENTERAL (Q1-12)
Q1 Order: potassium chloride 40 mEq PO daily.
Supply: 20 mEq per 15 mL.
Give: _______ mL
Answer: 30 mL
Rationale: (40 mEq ÷ 20 mEq) × 15 mL = 2 × 15 = 30 mL.
Q2 Order: cefazolin 500 mg IM.
Supply: 1 g vial; reconstitute with 2.5 mL → total 3 mL (333 mg/mL).
Give: _______ mL
Answer: 1.5 mL
Rationale: 500 mg ÷ 333 mg/mL = 1.5 mL.
Q3 Order: aspirin 650 mg PO now.
Supply: 325 mg tablets.
,Give: _______ tablets
Answer: 2 tablets
Rationale: 650 mg ÷ 325 mg = 2.
Q4 Order: phenobarbital 60 mg PO bid.
Supply: 30 mg tablets.
Give: _______ tablets
Answer: 2 tablets
Rationale: 60 mg ÷ 30 mg = 2.
Q5 Order: hydrochlorothiazide 12.5 mg PO daily.
Supply: 25 mg tablets (scored).
Give: _______ tablet
Answer: 0.5 tablet
Rationale: 12.5 mg ÷ 25 mg = 0.5.
Q6 Order: liquid antacid 30 mL PO after meals.
Supply: cup marked 15 mL.
Give: _______ cupfuls
Answer: 2 cupfuls
, Rationale: 30 mL ÷ 15 mL = 2.
Q7 Order: lactulose 20 g PO daily.
Supply: 10 g per 15 mL.
Give: _______ mL
Answer: 30 mL
Rationale: (20 g ÷ 10 g) × 15 mL = 2 × 15 = 30 mL.
Q8 Order: metformin 1,000 mg PO bid.
Supply: 500 mg tablets.
Give: _______ tablets per dose
Answer: 2 tablets
Rationale: 1,000 mg ÷ 500 mg = 2.
Q9 Order: digoxin 0.25 mg PO daily.
Supply: 0.125 mg tablets.
Give: _______ tablets
Answer: 2 tablets
Rationale: 0.25 mg ÷ 0.125 mg = 2.
Q10 Order: furosemide 40 mg PO now.
(Latest 2026/2027) – Practice Problems, Formulas
& Step-by-Step Solutions | Nursing Math Mastery
SECTION 1 – ORAL & BASIC PARENTERAL (Q1-12)
Q1 Order: potassium chloride 40 mEq PO daily.
Supply: 20 mEq per 15 mL.
Give: _______ mL
Answer: 30 mL
Rationale: (40 mEq ÷ 20 mEq) × 15 mL = 2 × 15 = 30 mL.
Q2 Order: cefazolin 500 mg IM.
Supply: 1 g vial; reconstitute with 2.5 mL → total 3 mL (333 mg/mL).
Give: _______ mL
Answer: 1.5 mL
Rationale: 500 mg ÷ 333 mg/mL = 1.5 mL.
Q3 Order: aspirin 650 mg PO now.
Supply: 325 mg tablets.
,Give: _______ tablets
Answer: 2 tablets
Rationale: 650 mg ÷ 325 mg = 2.
Q4 Order: phenobarbital 60 mg PO bid.
Supply: 30 mg tablets.
Give: _______ tablets
Answer: 2 tablets
Rationale: 60 mg ÷ 30 mg = 2.
Q5 Order: hydrochlorothiazide 12.5 mg PO daily.
Supply: 25 mg tablets (scored).
Give: _______ tablet
Answer: 0.5 tablet
Rationale: 12.5 mg ÷ 25 mg = 0.5.
Q6 Order: liquid antacid 30 mL PO after meals.
Supply: cup marked 15 mL.
Give: _______ cupfuls
Answer: 2 cupfuls
, Rationale: 30 mL ÷ 15 mL = 2.
Q7 Order: lactulose 20 g PO daily.
Supply: 10 g per 15 mL.
Give: _______ mL
Answer: 30 mL
Rationale: (20 g ÷ 10 g) × 15 mL = 2 × 15 = 30 mL.
Q8 Order: metformin 1,000 mg PO bid.
Supply: 500 mg tablets.
Give: _______ tablets per dose
Answer: 2 tablets
Rationale: 1,000 mg ÷ 500 mg = 2.
Q9 Order: digoxin 0.25 mg PO daily.
Supply: 0.125 mg tablets.
Give: _______ tablets
Answer: 2 tablets
Rationale: 0.25 mg ÷ 0.125 mg = 2.
Q10 Order: furosemide 40 mg PO now.
