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:ATI DOSAGE CALCULATIONS ACTUAL EXAM 230 REAL EXAM
:ATI DOSAGE CALCULATIONS ACTUAL EXAM 230 REAL EXAM
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ATI DOSAGE:
CALCULATIONS ACTUAL
EXAM 230 REAL EXAM
1. A patient is prescribed 500 mg of a medication, but the tablets on hand are 250 mg
each. How many tablets should you administer?
○ Answer: 2 tablets.
○ Explanation: 500 mg÷250 mg=2 tablets500 \, \text{mg} ÷ 250 \, \text{mg} = 2 \, \
text{tablets}500mg÷250mg=2tablets.
2. An order states to infuse 1,000 mL of saline over 8 hours. What is the IV flow rate
in mL/hr?
○ Answer: 125 mL/hr.
○ Explanation: 1000 mL÷8=125 mL/hr1000 \, \text{mL} ÷ 8 = 125 \,
\text{mL/hr}1000mL÷8=125mL/hr.
3. A medication is to be infused at a rate of 150 mL over 2 hours with a drop factor of
15 gtt/mL. Calculate the IV drop rate in gtt/min.
○ Answer: 19 gtt/min.
○ Explanation: 150 mL120 minutes×15 gtt/mL=18.75≈19 gtt/min\
frac{150 \, \text{mL}}{120 \, \text{minutes}} \times 15 \,
\text{gtt/mL} = 18.75 \approx 19 \, \text{gtt/min}120minutes150mL
×15gtt/mL=18.75≈19gtt/min
4. A prescription calls for 400 mg of a medication available in 200 mg tablets. How
many tablets should be given?
○ Answer: 2 tablets.
○ Explanation: 400 mg÷200 mg=2 tablets400 \, \text{mg} ÷ 200 \, \text{mg} = 2 \, \
text{tablets}400mg÷200mg=2tablets.
Dosage Calculations – Oral Medications
1. A patient is prescribed 800 mg of ibuprofen, and each tablet is 200 mg. How many
tablets should you give?
○ Answer: 4 tablets.
, ○ Explanation: 800 mg÷200 mg=4 tablets800 \, \text{mg} ÷ 200 \, \text{mg} = 4 \, \
text{tablets}800mg÷200mg=4tablets.
2. A doctor orders 25 mg of metoprolol, and you have 50 mg tablets available. How
many tablets should you administer?
○ Answer: 0.5 tablet.
○ Explanation: 25 mg÷50 mg=0.5 tablet25 \, \text{mg} ÷ 50 \, \text{mg} = 0.5 \, \
text{tablet}25mg÷50mg=0.5tablet.
3. You have 250 mg acetaminophen tablets and need to give a patient 1,000 mg. How
many tablets do you administer?
○ Answer: 4 tablets.
○ Explanation: 1000 mg÷250 mg=4 tablets1000 \, \text{mg} ÷ 250 \, \text{mg} = 4 \,
\text{tablets}1000mg÷250mg=4tablets.
4. A prescription requires 150 mg of a drug, and the available tablet strength is 50
mg. How many tablets will you give?
○ Answer: 3 tablets.
○ Explanation: 150 mg÷50 mg=3 tablets150 \, \text{mg} ÷ 50 \, \text{mg} = 3 \, \
text{tablets}150mg÷50mg=3tablets.
5. A prescription calls for 400 mg of a medication available in 200 mg tablets. How
many tablets should you administer?
○ Answer: 2 tablets.
○ Explanation: 400 mg÷200 mg=2 tablets400 \, \text{mg} ÷ 200 \, \text{mg} = 2 \, \
text{tablets}400mg÷200mg=2tablets.
Dosage Calculations – Liquid Medications
6. The order is for 300 mg of a medication in liquid form, with a concentration of 100
mg/mL. How many mL should you give?
○ Answer: 3 mL.
○ Explanation: 300 mg÷100 mg/mL=3 mL300 \, \text{mg} ÷ 100 \, \text{mg/mL} =
3 \, \text{mL}300mg÷100mg/mL=3mL.
7. A prescription is for 600 mg of liquid amoxicillin, and the concentration is 250
mg/5 mL. How much solution should be administered?
○ Answer: 12 mL.
○ Explanation: 600 mg÷250 mg×5 mL=12 mL600 \, \text{mg} ÷ 250 \, \text{mg} \
times 5 \, \text{mL} = 12 \, \text{mL}600mg÷250mg×5mL=12mL.
8. The order is 75 mg of medication, with a concentration of 50 mg/2 mL. How many
mL will you give?
○ Answer: 3 mL.
○ Explanation: 75 mg÷50 mg×2 mL=3 mL75 \, \text{mg} ÷ 50 \, \text{mg} \times 2 \,
\text{mL} = 3 \, \text{mL}75mg÷50mg×2mL=3mL.
9. A patient requires 400 mg of a drug, and the concentration is 200 mg/5 mL.
Calculate the required amount in mL.
○ Answer: 10 mL.
○ Explanation: 400 mg÷200 mg×5 mL=10 mL400 \, \text{mg} ÷ 200 \, \text{mg} \
times 5 \, \text{mL} = 10 \, \text{mL}400mg÷200mg×5mL=10mL.
10. The dose is 50 mg, and the medication is available in a 10 mg/mL concentration.
How many mL will be administered?
○ Answer: 5 mL.
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