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    ATI RN Pharmacology Proctored Exam 2023
    Calculation

    A nurse is preparing to administer phenobarbital 30 mg PO to a client. Available is phenobarbital 20 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

    mL

    Explanation & Rationale

    To calculate the correct dosage, use the formula: Dose to administer = (Desired dose/Available dose) ×Volume available Given: Desired dose = 30 mg Available ,dose = 20 mg Volume available = 5 mL (30mg/20mg) × 5ml = 7.5ml Final Answer: 7.5 mL

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