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Medical Dosage Calculations is a foundational course designed to equip students with the mathematical skills and knowledge necessary to accurately calculate medication dosages for safe patient care. Emphasizing mathematical concepts such as fractions, ratios, proportions, and conversions between measurement systems, the course covers the calculation of oral, intravenous, and parenteral medication doses. Students will apply critical thinking to real-world clinical scenarios, reinforce accuracy in medication administration, and develop confidence in preventing medication errors through practical exercises and case studies. This course is essential for students pursuing careers in nursing, pharmacy, and other healthcare disciplines.
Recommended Textbook
Currens Math for Meds Dosages and Solutions 11th Edition by Anna M. Curren
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Sample Questions
Q1) Subtract the decimals manually:
0.7 - 0.35 = __________
Answer: 0.35 11ea825f_1270_87aa_9591_0de530d1601f_TB3411_00
Q2) Choose the entry with the greatest value.
A) 0.11
B) 0.01
C) 0.1
D) 0.011
Answer: A
Q3) Subtract the decimals manually: 6.41 - 5.09 = __________
Answer: 1.32 11ea825f_126f_7637_9591_77d64dc248c0_TB3411_00
Q4) Choose the entry with the greatest value.
A) 3.75
B) 3.07
C) 3.77
D) 3.57
Answer: C

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Sample Questions
Q1) Express the dosage using the official symbol/abbreviation. one hundred milliequivalents
Q2) Identify the household measure. 4 gtt
Q3) Identify the household measure. 10 gtt
Q4) Express the dosage using the official symbol/abbreviation. one hundred units
Q5) Express the dosage using the official symbol/abbreviation. twenty units
Q6) Express the dosage using the official symbol/abbreviation. five thousand units
Q7) Express the dosage using the official symbol/abbreviation.
1 part drug to 25 parts solution
Q8) Express the dosage using the official symbol/abbreviation. 1 part drug to 30 parts solution
Q9) Identify the household measure.
2 t Page 4
Q10) Identify the household measure.
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Sample Questions
Q1) How much medication must be administered for the following order?
Order: potassium chloride 60 mEq
Q2) How much medication must be administered for the following order?
Order: Lopressor 25 mg
Dosage Strength: Lopressor 50 mg tablets
Q3) Indicate the number of tablets or capsules required to administer the ordered dose of this medication. Assume all tablets are scored.
Order: Thorazine 50 mg
Q4) What is the generic name of this medication?
Q5) How much medication must be administered for the following order?
Order: Acetaminophen 650 mg
Dosage Strength: Acetaminophen 325 mg tablets
Q6) How much medication must be administered for the following order?
Order: Antivert 12.5 mg
Dosage Strength: Antivert 25 mg tablets
Q7) How much medication must be administered for the following order?
Order: Flagyl 750 mg
Dosage Strength: Flagyl 500 mg tablets

Page 6
Q8) What is the generic name of this medication?
Q9) What is the trade name of this medication?
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Sample Questions
Q1) What is an MAR?
Q2) Find the error in the following order. Lisinopril 10.0 mg PO daily 0800
Q3) What is the correct conversion of 1730 (military time) to standard time?
Q4) What is the correct conversion of 2:45 p.m. (standard time) to military time?
Q5) What is the correct conversion of 4:30 p.m. (standard time) to military time?
Q6) While preparing dosages, how many times should the drug order and the drug label routinely be checked against each other?
Q7) What is the correct conversion of 0700 (military time) to standard time?
Q8) According to The Joint Commission (2005), the medical abbreviation "QOD" has been eliminated. What term should be used instead?
Q9) What is the correct conversion of 11:00 a.m. (standard time) to military time?
Q10) What is the correct conversion of 0020 (military time) to standard time?
Q11) What is the correct conversion of 1500 (military time) to standard time?
Page 8
Q12) What is the first step of action to take when a medication error has occurred?
Q13) What is the correct conversion of 0930 (military time) to standard time?
Q14) What is the correct conversion of 2300 (military time) to standard time?
Q15) Name three precautions that should be considered when using a transdermal patch.
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Sample Questions
Q1) Calculate the amount needed for the dose.
Order:
hydroxyzine HCl 50 mg IM stat
Give:

Q2) Calculate the amount needed for this order.
Order:
Heparin 5000 units subcut
Give:
Q3) According to the label, the dosage strength for Haldol is 5 mg/mL. How much is needed for this order?
Order:
Haldol 2 mg IM daily
Give:
Q4) What is the method of administration for this medication?
Q5) What is the expiration date of this medication?
Q7) How should this medication be stored? Page 10
Q6) What is the name of the manufacturer of this medication?
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Sample Questions
Q1) How many vials will be needed for the usual adult dosage of 1 gram?
Q2) You have reconstituted this medication at 7 a.m. on October 15. When will it need to be discarded?
Q3) If this drug is reconstituted on September 10 at 6 a.m., when must it be discarded if it is stored at room temperature?
Q4) What is the volume needed for a 35 mg dose?
Q5) You have just reconstituted the cytarabine. It is now 1645 on 10/30. When will this need to be discarded?
Q6) You have reconstituted the cytarabine with 10 mL of bacteriostatic water for injection with benzyl alcohol. What volume will you draw up for an ordered dose of 275 mg?
Q7) What is the usual adult dosage of nafcillin?
Q8) If reconstituted with bacteriostatic water for injection with benzyl alcohol, can this be used for intrathecal injection?
Q9) What is the recommended storage temperature for this medication?
Q10) What volume is needed for a dose of 140 mg?
Q11) If you add 33 mL of diluent to the vial, what volume will you draw up for a dose of 3.5 million units?
Q12) How long will the reconstituted Velosef retain its potency if refrigerated? Page 12
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Sample Questions
Q1) The drug label reads 1.5 g per 4 mL. Prepare a dose of 800 mg. Express your answer to the nearest tenth.
Q2) A dosage strength of 100,000 units per 3 mL is available. Give 140,000 units. Express your answer to the nearest tenth.
Q3) A dosage strength of 10 mg per 4 mL is available. Prepare a dose of 44 mg. Express your answer to the nearest tenth.
Q4) Prepare a dose of 110 mcg from a supply of 2 mg per 10 mL. Express your answer to the nearest tenth.
Q5) Prepare a 50 mg dose from a supply of 12.5 mg per mL. Express your answer to the nearest tenth.
Q6) The drug label reads 40 mEq per 15 mL. The order is for 55 mEq. Calculate the dosage volume. Express your answer to the nearest tenth.
Q7) Prepare a dose of 30 mEq from a supply of 40 mEq per 10 mL. Express your answer to the nearest tenth.
Q8) Prepare a 0.4 mg dose from a supply of 2 mg per mL. Express your answer to the nearest tenth.
Q9) Prepare a 2 g dose from a supply of 10 g per 6 mL. Express your answer to the nearest tenth.
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Sample Questions
Q1) The dose ordered is 40 mg. Solution available is 25 mg/mL. Calculate the dosage volume.
Q2) Prepare a 15 mg dose from 30 mg tablets.
Q3) An oral solution has a strength of 200 mg/mL. Prepare a 0.4 g dose.
Q4) A dosage of 0.5 g is ordered. Solution available is 500 mg/10 mL. Calculate the dosage volume.
Q5) A drug label reads 10 mg tablets. Prepare a 20 mg dose.
Q6) Prepare a 0.5 mg dose from an available strength of 300 mcg/mL. Express your answer to the nearest tenth.
Q7) The dosage ordered is 6 mg. Solution available is 4 mg/mL. Calculate the dosage volume.
Q8) Prepare a dose of 7.5 mg from the available strength of 25 mg/5 mL.
Q9) A dosage of 0.75 g is ordered. Solution available is 500 mg/mL. Calculate the dosage volume.
Q10) The ordered dose is 10 mEq. The available dose is 1 mEq/mL. Calculate the dosage volume.
Q12) The strength available is 500 mcg/mL. Prepare a 0.6 mg dose. Page 15
Q11) The ordered dose is 3 mg. Solution available is 25 mg/5 mL. Calculate the dosage volume.
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Sample Questions
Q1) The ordered dose is 175,000 units. The available strength is 500,000 units in 7.5 mL.
Q2) Prepare a 3.4 mg dosage from an ampule labeled 10 mg in 10 mL.
Q3) Prepare a dose of 0.1 g. Available strength is 250 mg in 5 mL.
Q4) An order is given for 65 mcg. The available container is labeled 10 mg in 30 mL.
Q5) You are to prepare 45 mEq for addition to an IV solution. The solution available is 10 mEq in 25 mL.
Q6) Prepare a dose of 12 mg from an available supply of 10 mg in 5 mL.
Q7) A dosage of 50 mEq has been ordered. The available container is labeled 90 mEq in 4 mL.
Q8) The order is for 6 mg. The drug is labeled 20 mg in 25 mL.
Q9) Draw up 14 units from a vial labeled 20 units in 5 mL.
Q10) You have available 0.2 g in 2 mL. Draw up a dosage of 100 mg.
Q11) The drug is labeled 50 mEq in 15 mL. Prepare a dose of 90 mEq.
Q12) The dosage strength available is 2 g in 50 mL. Draw up a dose of 4.5 g.
Q13) An order is written to administer 400 mcg. The available dosage is 1 mg in 2 mL. Page 17
Q14) The strength available is 60 mEq in 6 mL. Prepare 15 mEq.
Q15) 165 mcg is ordered and you have 0.6 mg in 5 mL available.
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Sample Questions
Q1) An infant weighs 14.3 lbs. What is the lower per dose dosage for this infant?
Q2) What is this patient's higher per dose dosage?
Q3) What is the higher total daily dose?
Q4) The prescriber orders 7000 mcg every 8 hours for a patient weighing 65 kg. Is this within the recommended range?
Q5) What is the lowest total dosage for the drug administration period for this patient?
Q6) What would be the total daily dosage if this medication were to be given every 4 hours?
Q7) What is the higher single dosage?
Q8) The prescriber orders "6000 mcg every 6 hours" for a patient weighing 51 kg. Is this within the recommended range?
Q9) What is this client's per dose dosage?
Q10) What is this patient's lower per dose dosage?
Q11) What would be the total daily dosage if this medication were to be given every 6 hours?
Q12) What is the highest total dosage for the drug administration period for this patient? Page 19
Q13) An infant weighs 14.3 lbs. What is the higher per dose dosage for this infant?
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Sample Questions
Q1) A patient with a BSA of 2.41 m<sup>2</sup> is receiving 48 units of bleomycin IV. At what total dose does the risk for pulmonary toxicity increase?
Q2) A 60-year-old client weighs 110 kg and is 191 cm tall.
Q3) Calculate the highest recommended dose for a patient with testicular cancer whose BSA is 1.7 m<sup>2</sup>.
Q4) Calculate a child's second dose. The child weighs 46 lb and is 40 in tall.
Q5) A patient with advanced ovarian cancer who has not received prior chemotherapy is to receive carboplatin and cyclophosphamide. Her weight is 70 kg and height is 175 cm. Calculate the carboplatin and cyclophosphamide dosages.
Q6) A 9-year-old child weighs 30 kg and is 100 cm tall.
Q7) What is the lower dose recommended for a patient with Hodgkin's disease who is 5 ft tall and weighs 130 lb?
Q8) Calculate the carboplatin and cyclophosphamide dosages for a client whose weight is 138 lb and height is 61 in.
Q9) What is the highest single dose for a client whose height is 70 in and weight is 166 lb?
Q11) An adult weighs 187 lb and is 69 in tall. Page 21
Q10) What is the higher dose for a client weighing 95 kg and measuring 182 cm?
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Sample Questions
Q1) Define the term "IV push."
Q2) What is a volumetric pump?
Q3) Parenteral nutrition solutions generally are not used for longer than ____________________ hours due to the risk of bacterial growth.
Q4) What is the abbreviation for 12.5% dextrose in 0.9% sodium chloride?
Q5) What is the correct fluid level for the IV drip chamber? Why?
Q6) The physician inserts the IV into the patient's subclavian vein.What type of line is this?
Q7) How many grams of dextrose are in 1000 mL of 12.5% dextrose in 0.9% sodium chloride?
Q8) A patient is ordered an IV of 1000 mL NS to infuse at 100 mL/hr. What clamp will you use to regulate/set this flow rate?
Q9) Lines attached to a primary line at an injection port, generally used to infuse medications, are called _________________________ or _________________________.
Q10) An IV solution contains 25 grams of dextrose in 500 mL of water. How would this be abbreviated?
Q12) Describe the irrigation routine for a saline lock. Page 23
Q11) In IV fluid abbreviations, D10LR identifies what IV fluid?
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Sample Questions
Q1) The ordered infusion is 1900 mL in 24 hours using a 15 gtt/mL set. After 11 hours, 800 mL remains. Calculate the rate (to the nearest whole number) to complete the infusion on time.
Q2) An infusion of 230 mL was ordered to infuse in 48 minutes. After 15 minutes the volume remaining is 160 mL. Calculate the new flow rate (to the nearest whole number) to complete the infusion on time. The set delivers 15 gtt/mL.
Q3) An IV infusion of 500 mL to infuse over 8 hours was started at 10 am. At 12:30 pm, there is 300 mL remaining. Recalculate the rate (to the nearest whole number) to complete the infusion on time using a 15 gtt/mL set.
Q4) Administer 125 mL in 45 minutes using a microdrip set. Calculate the gtt/min to the nearest whole number.
Q5) Calculate the rate (to the nearest whole number) for an infusion of 2300 mL to run over 20 hours using a 10 gtt/mL set.
Q6) Infuse 50 mL in 15 minutes using a 10 gtt/mL set. Calculate the gtt/min to the nearest whole number.
Q7) Infuse 7 mL in 5 minutes using a microdrip set. Calculate the gtt/min to the nearest whole number.
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Q1) A volume of 300 mL is started at 7:21 pm at a rate of 45 mL/hr. Calculate the infusion time and the completion time.
Q2) A volume of 390 mL is started at 7:09 am at a rate of 35 mL/hr. Calculate the infusion time and the completion time.
Q3) The flow rate ordered for 1 L is 65 mL/hr. It was started at 10 am. Calculate the infusion time and the completion time.
Q4) An IV of 930 mL is restarted at 4:15 pm at 75 mL/hr. Calculate the infusion time and the completion time.
Q5) An IV of 1020 mL is to infuse at 90 mL/hr. It is now 8:19 pm. Calculate the infusion time and the completion time.
Q6) An infusion of 1000 mL is to run at 140 mL/hr. It is now 2130. Calculate the infusion time and the completion time.
Q7) A medication volume of 240 mL is started at 10:10 am at a rate of 250 mL/hr. Calculate the infusion time and the completion time.
Q8) With 370 mL remaining, a rate change to 68 mL/hr is ordered. It is 12:34 pm. Calculate the infusion time and the completion time.
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Q1) The infusion is running at 14 mL/hr. The solution strength is 150 mg in 100 mL. Calculate the dose currently infusing in mcg/min to the nearest whole number.
Q2) A 4 g in 500 mL dosage is to infuse at 2 mg/min. Calculate the flow rate in mL/hr.
Q3) A drug is ordered to titrate between 4 and 6 mcg/kg/min. The body weight is 78.6 kg and the solution strength is 200 mg/100 mL. Calculate the dosage range in mcg/min and flow rate range in mL/hr.
Q4) A 35 mg/hr dosage is ordered and a 250 mg in 250 mL solution is available. Calculate the flow rate in mL/hr.
Q5) A solution of 100 mg in 500 mL is ordered to infuse at 0.9 mcg/kg/min for a patient weighing 74.3 kg. Calculate dosage (in mcg/min) to the nearest tenth and flow rate (in mL/hr) to the nearest whole number.
Q6) A patient weighs 53.1 kg. The order is to infuse 2 mcg/kg/min of a solution whose strength is 250 mg in 250 mL. Calculate dosage (in mcg/min) to the nearest tenth and flow rate (in mL/hr) to the nearest whole number.
Q7) A solution of 600 mg/500 mL is infusing at 60 mL/hr. Calculate the dose currently infusing in mcg/min to the nearest whole number.
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Q1) The order is to infuse 500 mL NS with 25,000 units heparin at 950 units/hr. Calculate the flow rate in mL/hr.
Q2) A rate of 200 units/hr is ordered using a solution of 15,000 units heparin in 250 mL. Calculate the flow rate in mL/hr.
Q3) The patient is to receive a heparin infusion of 580 units/hr from a solution containing 12,000 units of heparin in 500 mL. Calculate the flow rate in mL/hr.
Q4) The order is for 1200 units/hr of heparin. The solution strength is 30,000 units heparin in 1 L D5W. Calculate the flow rate in mL/hr.
Q5) The order is to infuse 650 units/hr of heparin from a solution of 10,000 units in 250 mL D5W. Calculate the flow rate in mL/hr.
Q6) A solution of 5000 units heparin in 100 mL NS is to infuse at 200 units/hr. Calculate the flow rate in mL/hr.
Q7) The order is to infuse 1L D5W with 45,000 units of heparin at 1450 units/hr. Calculate the flow rate in mL/hr.
Q8) Heparin 1500 units per hour is to be infused via a volumetric pump using an IV labeled 500 mL 0.9% sodium chloride with heparin 18,000 units. Calculate the flow rate in mL/hr.
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Sample Questions
Q1) Prepare a 200 mg dose from a supply dosage of 100 mg/mL.
Q2) Prepare a 100 mg dose from a dosage strength of 100 mg/mL.
Q3) Prepare a 2 mg dose from an elixir with a dosage strength of 0.5 mg/mL.
Q4) Prepare a 12.5 mg dose. The dosage supply is 6.25 mg/mL.
Q5) Prepare a 1 mg dose from a dosage strength of 10 mg/mL.
Q6) Prepare a 25 mg dose of medication with a dosage strength of 100 mg/5 mL.
Q7) Prepare a 50 mg dose. The supply dosage is 250 mg/5 mL.
Q8) Prepare a 75 mg dose of an oral antibiotic with a dosage strength of 125 mg/5 mL.
Q9) Prepare a 10 mg dose of a medication with the dosage strength of 20 mg/mL.
Q10) Prepare a 200 mg dose of an oral medication with a concentration of 125 mg/5 mL.
Q11) Prepare a 0.2 mg dose from a medication dosage strength of 0.25 mg/mL.
Q12) Prepare an 80 mg dose from an oral medication with the supply dose of 100 mg/5 mL.
Q13) Prepare an 8 mg dose from a supply dosage of 25 mg/mL.
Q15) Prepare a 60 mg dose from a supply dosage of 150 mg/mL. Page 29
Q14) Prepare a 300 mg dose from a dosage supply of 600 mg tabs.
Q16) Prepare a 0.3 mg dose from a supply dosage of 100 mcg/mL.
Q17) Prepare a 5 mg dose from a medication dosage strength of 10 mg/mL.
Q18) Prepare a 2.5 mg dose from a medication with the dosage strength of 5 mg/mL.
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Sample Questions
Q1) An infant weighing 7 lbs is to receive 10-15 units/kg/dose. Each dose is to infuse over 45 minutes. The available supply is labeled 12 units/10 mL.Calculate the normal dosage ranges to the nearest tenth and the flow rate ranges in gtt/min using a set calibrated to 60 gtt/mL.
Q2) A volume of 30 mL is to infuse in 45 minutes. Calculate the flow rate in gtt/min using a microdrip calibrated at 60 gtt/mL.
Q3) An infant weighing 10.3 lbs is to receive 75 mL/kg/day. Calculate the 24-hour fluid requirement and the EID setting in mL/hr for the 24-hour period.
Q4) Make an assessment of the order.
Q5) Calculate the dosage infusing per day.
Q6) Calculate the dosage infusing per hour.
Q7) Make an assessment of the order.
Q8) A child weighing 19.3 kg is to receive 7.5-9 mg/kg/dose. Each dose is to infuse over 50 minutes. The supply is labeled 10 mg/5 mL. Calculate the normal dosage ranges to the nearest tenth and the flow rate ranges in gtt/min using a set calibrated to 60 gtt/mL.
Q9) A child weighing 15.4 kg is to receive 150 mL/kg/day. Calculate the 24-hour fluid requirement and the EID setting in mL/hr for the 24-hour period.
Page 31
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