Reconstitution: doses per vial practice problems
Work each problem on paper first, rounding as the question says. Then open the answer to check it and see every step.
For study and exam practice, not for patient care. The orders in these problems are written for practice. In the clinic, follow the prescriber's order, your facility's protocols, and your pharmacy.
Problem 1
A 2 g vial of cefoxitin is reconstituted. The ordered dose is 1 g. How many full doses does the vial provide? Record your answer using a whole number.
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Answer: 2 doses
- Doses = vial amount ÷ dose = 2 g ÷ 1 g = 2.
- Only full doses count, so round down: 2 doses.
Problem 2
A 2 g vial of ampicillin is reconstituted. The ordered dose is 250 mg. How many full doses does the vial provide? Record your answer using a whole number.
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Answer: 8 doses
- Doses = vial amount ÷ dose = 2 g ÷ 250 mg = 8.
- Only full doses count, so round down: 8 doses.
Problem 3
The nurse is preparing an antibiotic for a client with a serious infection. A 2 g vial of oxacillin is reconstituted, and the ordered dose is 1 g. How many full doses does the vial provide? Record your answer using a whole number.
Show answer and steps
Answer: 2 doses
- Doses = vial amount ÷ dose = 2 g ÷ 1 g = 2.
- Only full doses count, so round down: 2 doses.
Problem 4
A 2 g vial of oxacillin is reconstituted. The ordered dose is 500 mg. How many full doses does the vial provide? Record your answer using a whole number.
Show answer and steps
Answer: 4 doses
- Doses = vial amount ÷ dose = 2 g ÷ 500 mg = 4.
- Only full doses count, so round down: 4 doses.
Problem 5
The client is receiving antibiotic therapy for a serious respiratory infection in the hospital. A 1 g vial of ceftriaxone is reconstituted for the client's care. The ordered dose is 250 mg. How many full doses does the vial provide? Record your answer using a whole number.
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Answer: 4 doses
- Doses = vial amount ÷ dose = 1 g ÷ 250 mg = 4.
- Only full doses count, so round down: 4 doses.
Problem 6
The nurse is caring for a client who has a prescription for oxacillin 500 mg. The nurse has a 1 g vial of oxacillin available after reconstitution. How many full doses does the vial provide? Record your answer using a whole number.
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Answer: 2 doses
- Doses = vial amount ÷ dose = 1 g ÷ 500 mg = 2.
- Only full doses count, so round down: 2 doses.
Problem 7
The nurse is caring for a client who has a prescription for ampicillin 500 mg. The nurse has a 1 g vial of ampicillin available that is reconstituted before use. How many full doses does the vial provide? Record your answer using a whole number.
Show answer and steps
Answer: 2 doses
- Doses = vial amount ÷ dose = 1 g ÷ 500 mg = 2.
- Only full doses count, so round down: 2 doses.
Problem 8
A 1 g vial of cefepime is reconstituted. The ordered dose is 0.5 g. How many full doses does the vial provide? Record your answer using a whole number.
Show answer and steps
Answer: 2 doses
- Doses = vial amount ÷ dose = 1 g ÷ 0.5 g = 2.
- Only full doses count, so round down: 2 doses.
Problem 9
The nurse is caring for a client who has a prescription for ampicillin 250 mg. The nurse has a 1 g vial of ampicillin available after reconstitution. How many full doses does the vial provide? Record your answer using a whole number.
Show answer and steps
Answer: 4 doses
- Doses = vial amount ÷ dose = 1 g ÷ 250 mg = 4.
- Only full doses count, so round down: 4 doses.
Problem 10
A 2 g vial of ampicillin is reconstituted. The ordered dose is 500 mg. How many full doses does the vial provide? Record your answer using a whole number.
Show answer and steps
Answer: 4 doses
- Doses = vial amount ÷ dose = 2 g ÷ 500 mg = 4.
- Only full doses count, so round down: 4 doses.
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