HESI Dosage Calculation Exam Latest Update| A Comprehensive Nursing Medication Math Review of 300 Practice Questions with Multichoice Answers and Rationales| Pass Guarantee (Brand New)

Are you preparing for the HESI Dosage Calculation Exam and feeling overwhelmed by the complex medication math? This comprehensive guide is your ultimate solution, designed to turn your anxiety into mastery. Featuring the latest 2026 updates, this document offers a rigorous review with 300 realistic practice questions that mirror the format and difficulty of the actual exam. Each question is paired with a detailed, step-by-step rationale to ensure you not only get the right answer but also understand the underlying calculation principles. From basic dose calculations to complex IV flow rates and intricate weight-based dosing, this guide leaves no stone unturned. Perfect for nursing students, new graduates, and practicing nurses seeking to refresh their skills, this study tool is your key to a guaranteed pass. HESI Dosage Calculation Exam Latest Update| A Comprehensive Nursing Medication Math Review of 300 Practice Questions with Multichoice Answers and Rationales| Pass Guarantee (Brand New) Summary of Key Formulas Used 1. Dose Calculation: Desired Dose ÷ Available Dose × Quantity 2. Weight-Based: Weight (kg) × Dose/kg 3. IV Flow Rate (gtt/min): Volume (mL) ÷ Time (min) × Drop Factor (gtt/mL) 4. IV Pump Rate (mL/hr): Volume (mL) ÷ Time (hours) 5. Infusion Time: Volume (mL) ÷ Rate (mL/hr) 6. Unit Conversions: o 1 g = 1,000 mg o 1 mg = 1,000 mcg o 1 L = 1,000 mL o 1 tsp = 5 mL o 1 Tbs = 15 mL o 1 oz = 30 mL o 1 kg = 2.2 lb Basic Dosage Calculations (Questions 1-50) 1. A patient has an order for Chloromycetin 500 mg every 6 hours. The drug comes in 250 mg capsules. What would the nurse administer? • A) 1 tablet • B) 2 tablets • C) 3 tablets • D) 4 tablets Answer: B) 2 tablets Rationale: 500 mg ÷ 250 mg per capsule = 2 capsules. The patient needs 2 capsules per dose. ________________________________________ 2. A nurse is to administer 150 mg of a drug intramuscularly. The label on the multidose vials reads 100 mg/mL. How much would the nurse give? • A) 1 mL • B) 1.5 mL • C) 2 mL • D) 0.5 mL Answer: B) 1.5 mL Rationale: 150 mg ÷ 100 mg/mL = 1.5 mL. The nurse should administer 1.5 mL. ________________________________________ 3. A nurse is to administer 30 mg of furosemide (Lasix) to a client with congestive heart failure. The vial contains 40 mg/mL. Which is the correct dose to administer? • A) 0.5 mL • B) 0.75 mL • C) 1 mL • D) 1.25 mL Answer: B) 0.75 mL Rationale: 30 mg ÷ 40 mg/mL = 0.75 mL. The nurse should administer 0.75 mL of Lasix. ________________________________________ 4. A client has been prescribed 600 mg of an oral liquid medication. The label reads: 250 mg/mL. How many milliliters should the nurse instruct the mother to give? • A) 1.4 mL • B) 2 mL • C) 2.4 mL • D) 3 mL Answer: C) 2.4 mL Rationale: 600 mg ÷ 250 mg/mL = 2.4 mL. The mother should administer 2.4 mL. ________________________________________ 5. A child is to receive 500 mg of an antibiotic suspension. The label on the bottle reads 250 mg/5 mL. The nurse should administer how much of the suspension in one dose? • A) 5 mL • B) 7.5 mL • C) 10 mL • D) 12.5 mL Answer: C) 10 mL Rationale: (500 mg ÷ 250 mg) × 5 mL = 2 × 5 mL = 10 mL. ________________________________________ 6. A health care provider orders 250 mg of an antibiotic suspension. The label reads "500 mg/5 mL." How much would the nurse administer? • A) 1.5 mL • B) 2 mL • C) 2.5 mL • D) 3 mL Answer: C) 2.5 mL Rationale: (250 mg ÷ 500 mg) × 5 mL = 0.5 × 5 mL = 2.5 mL. ________________________________________ 7. A client is to be given ascorbic acid 1 g daily by mouth. The medication comes in 250 mg tablets. How much will the nurse give? • A) 2 tablets • B) 3 tablets • C) 4 tablets • D) 5 tablets Answer: C) 4 tablets Rationale: 1 g = 1000 mg. 1000 mg ÷ 250 mg per tablet = 4 tablets. ________________________________________ 8. The PCP orders amoxicillin 250 mg by mouth twice daily. The drug label reads "Amoxicillin 125 mg/5 mL." How much will the nurse administer? • A) 5 mL • B) 7.5 mL • C) 10 mL • D) 12.5 mL Answer: C) 10 mL Rationale: (250 mg ÷ 125 mg) × 5 mL = 2 × 5 mL = 10 mL. ________________________________________ 9. A nurse is to administer 175 mg of a medication IM. The label on the multidose vial states the concentration is 100 mg/mL. What volume should the nurse administer? • A) 1.5 mL • B) 1.7 mL • C) 1.75 mL • D) 2 mL Answer: B) 1.7 mL Rationale: 175 mg ÷ 100 mg/mL = 1.75 mL (rounded to 1.7 mL for a standard syringe). ________________________________________ 10. The nurse is preparing to administer 80 mg of Solu-medrol IV. The vial states 120 mg per 2 mL. The nurse would correctly draw up which amount? • A) 1 mL • B) 1.3 mL • C) 1.5 mL • D) 2 mL Answer: B) 1.3 mL Rationale: 120 mg/2 mL = 60 mg/mL. 80 mg ÷ 60 mg/mL = 1.33 mL ≈ 1.3 mL. ________________________________________ 11. The health care provider prescribes ascorbic acid 0.5 g daily. The drug label reads ascorbic acid 250 mg. The nurse would administer how many tablets? • A) 1 tablet • B) 2 tablets • C) 3 tablets • D) 4 tablets Answer: B) 2 tablets Rationale: 0.5 g = 500 mg. 500 mg ÷ 250 mg per tablet = 2 tablets. ________________________________________ 12. A client is being treated for CHF and is to receive 0.5 milligrams of digoxin, available in 250-microgram tablets. How many tablets should the nurse administer? • A) 1 tablet • B) 1.5 tablets • C) 2 tablets • D) 2.5 tablets Answer: C) 2 tablets Rationale: 0.5 mg = 500 mcg. 500 mcg ÷ 250 mcg per tablet = 2 tablets. ________________________________________ 13. The nurse is to administer 25 mg of meperidine (Demerol). The vial contains meperidine 50 mg/1 mL. How much medication should the nurse draw up? • A) 0.25 mL • B) 0.5 mL • C) 0.75 mL • D) 1 mL Answer: B) 0.5 mL Rationale: 25 mg ÷ 50 mg/mL = 0.5 mL. ________________________________________