NCLEX Med Math Mastery |
2025/2026 Latest Edition
Real Exam-Based Calculation Questions and Verified
Answers | 100% Accuracy | Medication Dosage & IV
Calculations | Graded A+
Introduction
This resource includes 85 verified dosage calculation and medication math practice
questions and correct answers tailored for the 2025/2026 NCLEX exam cycle. It focuses
on essential med math competencies such as conversions, IV flow rates, dimensional
analysis, ratio-proportion methods, and critical care dosing. Aligned with current NCLEX-
RN/PN testing standards to ensure accurate and practical preparation.
Answer Format
All correct answers are clearly marked in bold and green to enhance review efficiency and
build confidence in dosage calculations.
Questions
1. A patient is prescribed 500 mg of amoxicillin to be taken every 8 hours.
The pharmacy provides 250 mg capsules. How many capsules should the
patient take per dose?
a) 1 capsule
b) 2 capsules
c) 3 capsules
d) 4 capsules
b) 2 capsules
Rationale: 500 mg ÷ 250 mg/capsule = 2 capsules per dose.
2. A medication order calls for 1.5 g of cefazolin IV. The vial contains 500
mg/mL. How many mL should be administered?
a) 1 mL
b) 2 mL
c) 3 mL
,d) 4 mL
c) 3 mL
Rationale: 1.5 g = 1500 mg. 1500 mg ÷ 500 mg/mL = 3 mL.
3. A patient is to receive 1000 mL of normal saline over 8 hours via IV.
The IV tubing has a drop factor of 15 gtt/mL. What is the flow rate in
gtt/min?
a) 31 gtt/min
b) 42 gtt/min
c) 50 gtt/min
d) 62 gtt/min
a) 31 gtt/min
Rationale: Total volume = 1000 mL, time = 8 hours = 480 minutes. Flow rate = 1000 mL ÷
480 min = 2.083 mL/min. Drops/min = 2.083 mL/min × 15 gtt/mL ≈ 31 gtt/min.
4. A patient is prescribed 25 mg of diphenhydramine IV. The vial is
labeled 50 mg/2 mL. How many mL should be administered?
a) 0.5 mL
b) 1 mL
c) 1.5 mL
d) 2 mL
b) 1 mL
Rationale: 50 mg/2 mL = 25 mg/mL. 25 mg ÷ 25 mg/mL = 1 mL.
5. A patient weighs 70 kg and is prescribed a medication at 5 mg/kg/day
in two divided doses. How many mg should the patient receive per dose?
a) 175 mg
b) 350 mg
c) 700 mg
d) 1400 mg
a) 175 mg
Rationale: 70 kg × 5 mg/kg/day = 350 mg/day. 350 mg ÷ 2 doses = 175 mg/dose.
6. A patient is to receive 500 mL of D5W over 4 hours. What is the IV
flow rate in mL/hr?
, a) 100 mL/hr
b) 125 mL/hr
c) 150 mL/hr
d) 200 mL/hr
b) 125 mL/hr
Rationale: 500 mL ÷ 4 hours = 125 mL/hr.
7. A medication order is for 0.25 mg of digoxin IV. The vial contains 0.5
mg/2 mL. How many mL should be administered?
a) 0.5 mL
b) 1 mL
c) 1.5 mL
d) 2 mL
b) 1 mL
Rationale: 0.5 mg/2 mL = 0.25 mg/mL. 0.25 mg ÷ 0.25 mg/mL = 1 mL.
8. A patient is prescribed 10 units of regular insulin. The vial is labeled
100 units/mL. How many mL should be administered?
a) 0.1 mL
b) 0.2 mL
c) 0.5 mL
d) 1 mL
a) 0.1 mL
Rationale: 10 units ÷ 100 units/mL = 0.1 mL.
9. A patient is to receive 750 mL of LR over 6 hours. The IV tubing has a
drop factor of 10 gtt/mL. What is the flow rate in gtt/min?
a) 21 gtt/min
b) 25 gtt/min
c) 30 gtt/min
d) 42 gtt/min
a) 21 gtt/min
Rationale: 750 mL ÷ 6 hours = 125 mL/hr. 125 mL/hr ÷ 60 min = 2.083 mL/min. 2.083
mL/min × 10 gtt/mL ≈ 21 gtt/min.
2025/2026 Latest Edition
Real Exam-Based Calculation Questions and Verified
Answers | 100% Accuracy | Medication Dosage & IV
Calculations | Graded A+
Introduction
This resource includes 85 verified dosage calculation and medication math practice
questions and correct answers tailored for the 2025/2026 NCLEX exam cycle. It focuses
on essential med math competencies such as conversions, IV flow rates, dimensional
analysis, ratio-proportion methods, and critical care dosing. Aligned with current NCLEX-
RN/PN testing standards to ensure accurate and practical preparation.
Answer Format
All correct answers are clearly marked in bold and green to enhance review efficiency and
build confidence in dosage calculations.
Questions
1. A patient is prescribed 500 mg of amoxicillin to be taken every 8 hours.
The pharmacy provides 250 mg capsules. How many capsules should the
patient take per dose?
a) 1 capsule
b) 2 capsules
c) 3 capsules
d) 4 capsules
b) 2 capsules
Rationale: 500 mg ÷ 250 mg/capsule = 2 capsules per dose.
2. A medication order calls for 1.5 g of cefazolin IV. The vial contains 500
mg/mL. How many mL should be administered?
a) 1 mL
b) 2 mL
c) 3 mL
,d) 4 mL
c) 3 mL
Rationale: 1.5 g = 1500 mg. 1500 mg ÷ 500 mg/mL = 3 mL.
3. A patient is to receive 1000 mL of normal saline over 8 hours via IV.
The IV tubing has a drop factor of 15 gtt/mL. What is the flow rate in
gtt/min?
a) 31 gtt/min
b) 42 gtt/min
c) 50 gtt/min
d) 62 gtt/min
a) 31 gtt/min
Rationale: Total volume = 1000 mL, time = 8 hours = 480 minutes. Flow rate = 1000 mL ÷
480 min = 2.083 mL/min. Drops/min = 2.083 mL/min × 15 gtt/mL ≈ 31 gtt/min.
4. A patient is prescribed 25 mg of diphenhydramine IV. The vial is
labeled 50 mg/2 mL. How many mL should be administered?
a) 0.5 mL
b) 1 mL
c) 1.5 mL
d) 2 mL
b) 1 mL
Rationale: 50 mg/2 mL = 25 mg/mL. 25 mg ÷ 25 mg/mL = 1 mL.
5. A patient weighs 70 kg and is prescribed a medication at 5 mg/kg/day
in two divided doses. How many mg should the patient receive per dose?
a) 175 mg
b) 350 mg
c) 700 mg
d) 1400 mg
a) 175 mg
Rationale: 70 kg × 5 mg/kg/day = 350 mg/day. 350 mg ÷ 2 doses = 175 mg/dose.
6. A patient is to receive 500 mL of D5W over 4 hours. What is the IV
flow rate in mL/hr?
, a) 100 mL/hr
b) 125 mL/hr
c) 150 mL/hr
d) 200 mL/hr
b) 125 mL/hr
Rationale: 500 mL ÷ 4 hours = 125 mL/hr.
7. A medication order is for 0.25 mg of digoxin IV. The vial contains 0.5
mg/2 mL. How many mL should be administered?
a) 0.5 mL
b) 1 mL
c) 1.5 mL
d) 2 mL
b) 1 mL
Rationale: 0.5 mg/2 mL = 0.25 mg/mL. 0.25 mg ÷ 0.25 mg/mL = 1 mL.
8. A patient is prescribed 10 units of regular insulin. The vial is labeled
100 units/mL. How many mL should be administered?
a) 0.1 mL
b) 0.2 mL
c) 0.5 mL
d) 1 mL
a) 0.1 mL
Rationale: 10 units ÷ 100 units/mL = 0.1 mL.
9. A patient is to receive 750 mL of LR over 6 hours. The IV tubing has a
drop factor of 10 gtt/mL. What is the flow rate in gtt/min?
a) 21 gtt/min
b) 25 gtt/min
c) 30 gtt/min
d) 42 gtt/min
a) 21 gtt/min
Rationale: 750 mL ÷ 6 hours = 125 mL/hr. 125 mL/hr ÷ 60 min = 2.083 mL/min. 2.083
mL/min × 10 gtt/mL ≈ 21 gtt/min.
