ATI Dosage Calculations Fundamentals Proctored Medication Labels 3.2

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Sample questions from ATI Dosage Calculations Fundamentals Proctored Medication Labels 3.2

This material has 90 questions with answers and rationales. Here are the first 5.

1. 1.A medication label reads: acetaminophen 325 mg per tablet. The prescription is for 650 mg by mouth. How many tablets should the nurse administer?

   • A.1 tablet
   • B.2 tablets
   • C.3 tablets
   • D.4 tablets

   Rationale: Divide the prescribed dose by the amount in each tablet: 650 mg / 325 mg per tablet = 2 tablets. One tablet supplies only 325 mg, while 3 or 4 tablets would exceed the prescribed dose. The exam takeaway is to identify the dose per unit on the label before calculating the number of units.

2. 2.The prescription is for 0.5 g of a medication. The label states 250 mg per tablet. How many tablets should the nurse administer?

   • A.0.5 tablet
   • B.1 tablet
   • C.2 tablets
   • D.4 tablets

   Rationale: Convert 0.5 g to 500 mg, then divide 500 mg by 250 mg per tablet to obtain 2 tablets. One tablet provides only half the prescribed amount, and 4 tablets would provide twice the prescribed amount. Convert units to match the label before calculating.

3. 3.A bottle label states amoxicillin 125 mg/5 mL. The prescription is for 250 mg by mouth. How many milliliters should the nurse administer?

   • A.5 mL
   • B.7.5 mL
   • C.10 mL
   • D.12.5 mL

   Rationale: The label provides 125 mg in 5 mL, so 250 mg is twice that dose and requires 10 mL. Five milliliters supplies only 125 mg, while 7.5 mL and 12.5 mL supply doses that do not match the prescription. Use the concentration on the label, not the total bottle volume.

4. 4.A medication label reads 80 mg/2 mL. The prescribed dose is 60 mg IM. How many milliliters should the nurse administer?

   • A.0.75 mL
   • B.1 mL
   • C.1.5 mL
   • D.2 mL

   Answer and rationale are in the full material.

5. 5.A vial contains 1 g of powder. The label directs the nurse to add 4 mL of diluent to yield a final concentration of 200 mg/mL. The prescription is for 600 mg. How many milliliters should the nurse withdraw?

   • A.2 mL
   • B.3 mL
   • C.4 mL
   • D.5 mL

   Answer and rationale are in the full material.