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Practice Question

The healthcare provider prescribes cefazolin 800 mg IM every 6 hours. The available vial is labeled, "Cefazolin 1 gram," and instructions for reconstitution state, "For IM use, add 2.5 mL sterile water for injection to provide a total volume of 3.0 mL.

Answer Choices:

Correct Answer:

2.4

Rationale:

✏️To determine how many mL to administer for a prescribed dose of 800 mg when using a reconstituted vial of 1 gram (1000 mg) in 3.0 mL,

Follow this step-by-step calculation:

✏️ Available concentration:

1 gram = 1000 mg in 3.0 mL

So, concentration =1000 mg/3.0 mL=333.33 mg/mL

✏️ Desired dose: 800 mg

✏️ Volume to administer:800 mg/333.33 mg/mL=2.4 mL

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This question is from Hesi-RN Dosage D441 which contains 55 questions.

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Hesi-RN Dosage D441

55 Questions

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Question Details
  • Category: RN Nursing Exam(s)
  • Subcategory: HESI Exam(s)
  • Domain: Hesi Dosage Calculations
  • Answer Choices: 1
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