ATI Dosage Calculation and Safe
Medication Administration 3.0 - Powdered
Medications
A nurse is preparing to administer cefazolin 500 mg IV bolus. The nurse reconstitutes a vial of
cefazolin to yield a final concentration of 100 mg/mL. How many mL should the nurse
administer? - ANS5 mL
Rationale:
1. 100 mg/1 mL = 500 mg/x mL
2. 100x = 500
3. x = 5 mL
A nurse is preparing to administer amoxicillin 775 mg PO. The nurse reconstitutes a container of
amoxicillin to yield a final concentration of 400 mg/5 mL. How many mL should the nurse
administer? (Round to the nearest tenth.) - ANS9.7 mL
Rationale:
1. 400 mg/5 mL = 775 mg/x mL
2. 400x = 3,875
3. x = 9.6875 mL
4. x = 9.7 mL (rounded)
A nurse is preparing to administer cefaclor 400 mg PO. The nurse reconstitutes a container of
cefaclor to yield a final concentration of 187 mg/5 mL. How many mL should the nurse
administer? (Round to the nearest tenth.) - ANS10.7 mL
Rationale:
1. 187 mg/5 mL = 400 mg/x mL
2. 187x = 2,000
3. x = 10.695187 mL
4. x = 10.7 mL (rounded)
A nurse is preparing to administer pentamidine 1.75 mg IM. The nurse reconstitutes a vial of
pentamidine to yield a final concentration of 100 mg/mL. How many mL should the nurse
administer? (Round to the nearest tenth.) - ANS1.8 mL
Rationale:
1. 100 mg/1 mL = 175 mg/x mL
, 2. 100x = 175
3. x = 1.75 mL
4. x = 1.8 mL (rounded)
A nurse is preparing to administer nafcillin 0.5 g IM. The nurse reconstitutes a vial of nafcillin to
yield a final concentration of 250 mg/mL. How many mL should the nurse administer? - ANS2
mL
Rationale:
1. 0.5 g = 500 mg
2. 250 mg/1 mL = 500 mg/x mL
3. 250x = 500
4. x = 2 mL
A nurse is preparing to reconstitute and administer a powdered medication in a multidose vial.
Which of the following actions should the nurse plan to take?
A. Use a filtered needle to administer the medication.
B. Briskly shake the medication vial after adding the diluent.
C. Label the vial with the date and time before administering the medication.
D. Swab the rubber seal on the vial with triclosan prior to adding the diluent. - ANSC. Label the
vial with the date and time before administering the medication.
Rationale:
A. The nurse should use a filtered needle to withdraw mixed liquid medications from a vial to
filter out particles that could harm the client. The nurse should use a new, non-filtered needle to
administer the medication to the client.
B. The nurse should gently roll the medication to mix it. Shaking the medication can cause
bubbles to form that could harm the client.
C. The nurse should label the vial with the date, time, the nurse's initials, and the concentration
of the medication to ensure safe medication administration.
D. The nurse should swab the rubber seal on the medication vial with an alcohol swab to
disinfect the vial before adding the diluent.
A nurse is preparing to administer nafcillin 375 mg IM to a school-age child. Available is nafcillin
powder for injection 2 g vial. The nurse reconstitutes the vial to yield a final concentration of 250
mg/mL. How many mL should the nurse administer? - ANS1.5 mL
Rationale:
1. 250 mg/1 mL = 375 mg/x mL
2. 250x = 375
3. x = 1.5 mL
Medication Administration 3.0 - Powdered
Medications
A nurse is preparing to administer cefazolin 500 mg IV bolus. The nurse reconstitutes a vial of
cefazolin to yield a final concentration of 100 mg/mL. How many mL should the nurse
administer? - ANS5 mL
Rationale:
1. 100 mg/1 mL = 500 mg/x mL
2. 100x = 500
3. x = 5 mL
A nurse is preparing to administer amoxicillin 775 mg PO. The nurse reconstitutes a container of
amoxicillin to yield a final concentration of 400 mg/5 mL. How many mL should the nurse
administer? (Round to the nearest tenth.) - ANS9.7 mL
Rationale:
1. 400 mg/5 mL = 775 mg/x mL
2. 400x = 3,875
3. x = 9.6875 mL
4. x = 9.7 mL (rounded)
A nurse is preparing to administer cefaclor 400 mg PO. The nurse reconstitutes a container of
cefaclor to yield a final concentration of 187 mg/5 mL. How many mL should the nurse
administer? (Round to the nearest tenth.) - ANS10.7 mL
Rationale:
1. 187 mg/5 mL = 400 mg/x mL
2. 187x = 2,000
3. x = 10.695187 mL
4. x = 10.7 mL (rounded)
A nurse is preparing to administer pentamidine 1.75 mg IM. The nurse reconstitutes a vial of
pentamidine to yield a final concentration of 100 mg/mL. How many mL should the nurse
administer? (Round to the nearest tenth.) - ANS1.8 mL
Rationale:
1. 100 mg/1 mL = 175 mg/x mL
, 2. 100x = 175
3. x = 1.75 mL
4. x = 1.8 mL (rounded)
A nurse is preparing to administer nafcillin 0.5 g IM. The nurse reconstitutes a vial of nafcillin to
yield a final concentration of 250 mg/mL. How many mL should the nurse administer? - ANS2
mL
Rationale:
1. 0.5 g = 500 mg
2. 250 mg/1 mL = 500 mg/x mL
3. 250x = 500
4. x = 2 mL
A nurse is preparing to reconstitute and administer a powdered medication in a multidose vial.
Which of the following actions should the nurse plan to take?
A. Use a filtered needle to administer the medication.
B. Briskly shake the medication vial after adding the diluent.
C. Label the vial with the date and time before administering the medication.
D. Swab the rubber seal on the vial with triclosan prior to adding the diluent. - ANSC. Label the
vial with the date and time before administering the medication.
Rationale:
A. The nurse should use a filtered needle to withdraw mixed liquid medications from a vial to
filter out particles that could harm the client. The nurse should use a new, non-filtered needle to
administer the medication to the client.
B. The nurse should gently roll the medication to mix it. Shaking the medication can cause
bubbles to form that could harm the client.
C. The nurse should label the vial with the date, time, the nurse's initials, and the concentration
of the medication to ensure safe medication administration.
D. The nurse should swab the rubber seal on the medication vial with an alcohol swab to
disinfect the vial before adding the diluent.
A nurse is preparing to administer nafcillin 375 mg IM to a school-age child. Available is nafcillin
powder for injection 2 g vial. The nurse reconstitutes the vial to yield a final concentration of 250
mg/mL. How many mL should the nurse administer? - ANS1.5 mL
Rationale:
1. 250 mg/1 mL = 375 mg/x mL
2. 250x = 375
3. x = 1.5 mL
