ATI Dosage Calculation RN Fundamentals Proctored
Assessment 3.2 – Questions and Answers
Q001
Problem Type: Metric Conversion / Liquid Oral
Clinical Scenario: A patient is prescribed 500 mg of amoxicillin oral suspension PO
every 8 hours. The suspension on hand is 250 mg per 5 mL.
Given: Order: 500 mg; Available: 250 mg/5 mL; No additional patient factors.
Question: How many mL will the nurse administer per dose?
(Correct Numeric Answer: 10 mL)
Work & Rationale:
● Setup: Desired/Have × Volume = 500 mg / 250 mg × 5 mL
● Calculation: 2 × 5 mL = 10 mL
● Safety Check: Dose is within safe adult range; confirm no penicillin allergy.
Q002
Problem Type: IM Injection
Clinical Scenario: A patient is ordered 0.5 mg of Atropine sulfate IM pre-operatively. The
vial reads 0.4 mg/mL.
Given: Order: 0.5 mg; Available: 0.4 mg/mL; IM route.
Question: How many mL will the nurse give? (Round to nearest tenth.)
(Correct Numeric Answer: 1.3 mL)
,Work & Rationale:
● Setup: 0.5 mg / 0.4 mg × 1 mL
● Calculation: 1.25 mL → round to 1.3 mL
● Safety Check: Do not exceed 2 mL per IM site; dose acceptable.
Q003
Problem Type: Weight-Based PO Liquid
Clinical Scenario: A child weighing 22 lb is prescribed acetaminophen 15 mg/kg PO q6h
prn for fever. The elixir is 160 mg/5 mL.
Given: Weight: 22 lb; Order: 15 mg/kg; Available: 160 mg/5 mL; Convert lb → kg.
Question: How many mL per dose? (Round to nearest tenth.)
(Correct Numeric Answer: 4.7 mL)
Work & Rationale:
● Setup: 22 lb ÷ 2.2 = 10 kg; 15 mg × 10 kg = 150 mg needed; 150 mg / 160 mg × 5
mL
● Calculation: 0.9375 × 5 = 4.6875 → 4.7 mL
● Safety Check: Dose 150 mg is safe for 10 kg child (max 75 mg/kg/day).
Q004
Problem Type: IV Drip Rate (gtt/min)
Clinical Scenario: The provider orders 1000 mL of 0.9% NaCl to infuse over 8 hours. The
administration set delivers 15 gtt/mL.
Given: Volume: 1000 mL; Time: 8 h; Set: 15 gtt/mL; No pump available.
Question: Calculate the drip rate in gtt/min. (Round to nearest whole drop.)
, (Correct Numeric Answer: 31 gtt/min)
Work & Rationale:
● Setup: 1000 mL ÷ 8 h = 125 mL/h; 125 mL/h × 15 gtt/mL = 1875 gtt/h; 1875 ÷ 60
min
● Calculation: 31.25 → 31 gtt/min
● Safety Check: Count drops for 1 full minute; adjust clamp accordingly.
Q005
Problem Type: SubQ Injection
Clinical Scenario: A patient is prescribed Insulin regular 8 units subQ now. The vial reads
100 units/mL.
Given: Order: 8 units; Available: 100 units/mL; standard U-100 syringe.
Question: How many mL will the nurse administer?
(Correct Numeric Answer: 0.08 mL)
Work & Rationale:
● Setup: 8 units / 100 units × 1 mL
● Calculation: 0.08 mL
● Safety Check: Draw in 0.3 mL insulin syringe to 8-unit line; verify with second
nurse.
Q006
Problem Type: Metric Conversion / Tablets
Clinical Scenario: A patient is prescribed 0.5 g of metformin PO BID. The tablets are 500
mg each.
Given: Order: 0.5 g; Available: 500 mg/tab; BID schedule.
Assessment 3.2 – Questions and Answers
Q001
Problem Type: Metric Conversion / Liquid Oral
Clinical Scenario: A patient is prescribed 500 mg of amoxicillin oral suspension PO
every 8 hours. The suspension on hand is 250 mg per 5 mL.
Given: Order: 500 mg; Available: 250 mg/5 mL; No additional patient factors.
Question: How many mL will the nurse administer per dose?
(Correct Numeric Answer: 10 mL)
Work & Rationale:
● Setup: Desired/Have × Volume = 500 mg / 250 mg × 5 mL
● Calculation: 2 × 5 mL = 10 mL
● Safety Check: Dose is within safe adult range; confirm no penicillin allergy.
Q002
Problem Type: IM Injection
Clinical Scenario: A patient is ordered 0.5 mg of Atropine sulfate IM pre-operatively. The
vial reads 0.4 mg/mL.
Given: Order: 0.5 mg; Available: 0.4 mg/mL; IM route.
Question: How many mL will the nurse give? (Round to nearest tenth.)
(Correct Numeric Answer: 1.3 mL)
,Work & Rationale:
● Setup: 0.5 mg / 0.4 mg × 1 mL
● Calculation: 1.25 mL → round to 1.3 mL
● Safety Check: Do not exceed 2 mL per IM site; dose acceptable.
Q003
Problem Type: Weight-Based PO Liquid
Clinical Scenario: A child weighing 22 lb is prescribed acetaminophen 15 mg/kg PO q6h
prn for fever. The elixir is 160 mg/5 mL.
Given: Weight: 22 lb; Order: 15 mg/kg; Available: 160 mg/5 mL; Convert lb → kg.
Question: How many mL per dose? (Round to nearest tenth.)
(Correct Numeric Answer: 4.7 mL)
Work & Rationale:
● Setup: 22 lb ÷ 2.2 = 10 kg; 15 mg × 10 kg = 150 mg needed; 150 mg / 160 mg × 5
mL
● Calculation: 0.9375 × 5 = 4.6875 → 4.7 mL
● Safety Check: Dose 150 mg is safe for 10 kg child (max 75 mg/kg/day).
Q004
Problem Type: IV Drip Rate (gtt/min)
Clinical Scenario: The provider orders 1000 mL of 0.9% NaCl to infuse over 8 hours. The
administration set delivers 15 gtt/mL.
Given: Volume: 1000 mL; Time: 8 h; Set: 15 gtt/mL; No pump available.
Question: Calculate the drip rate in gtt/min. (Round to nearest whole drop.)
, (Correct Numeric Answer: 31 gtt/min)
Work & Rationale:
● Setup: 1000 mL ÷ 8 h = 125 mL/h; 125 mL/h × 15 gtt/mL = 1875 gtt/h; 1875 ÷ 60
min
● Calculation: 31.25 → 31 gtt/min
● Safety Check: Count drops for 1 full minute; adjust clamp accordingly.
Q005
Problem Type: SubQ Injection
Clinical Scenario: A patient is prescribed Insulin regular 8 units subQ now. The vial reads
100 units/mL.
Given: Order: 8 units; Available: 100 units/mL; standard U-100 syringe.
Question: How many mL will the nurse administer?
(Correct Numeric Answer: 0.08 mL)
Work & Rationale:
● Setup: 8 units / 100 units × 1 mL
● Calculation: 0.08 mL
● Safety Check: Draw in 0.3 mL insulin syringe to 8-unit line; verify with second
nurse.
Q006
Problem Type: Metric Conversion / Tablets
Clinical Scenario: A patient is prescribed 0.5 g of metformin PO BID. The tablets are 500
mg each.
Given: Order: 0.5 g; Available: 500 mg/tab; BID schedule.
