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NURS 4073 ; Dosage Calculation RN Fundamentals Online Practice Assessment 20. A nurse is preparing to administer phenytoin 200 mg PO. Available is phenytoin oral suspension 125 mg/mL. How many mL should the nurse administer? 8 ml 21. A nurse is preparing to administer 2 Tbsp of ibuprofen to a client. How many mL should the nurse administer per dose? 30 ml 22. A nurse is preparing to administer tobramycin 4 mg/kg/day IM divided in three equal doses to a client who weighs 60 kg. Available is tobramycin 40 mg/mL. How many mL should the nurse administer per dose? 2 ml 23. A nurse is preparing to administer phenobarbital 6 mg/kg/day PO divided in equal doses every 12 hours to a client who weighs 44 lb. Available is phenobarbital elixir 20 mg/5 mL. The nurse should administer how many mL per dose? 15 ml 24. A nurse is preparing to administer lorazepam 0.05 mg/kg IM 2 hr prior to surgery to a client who weighs 138 lb. Available is lorazepam injection 2 mg/mL. How many mL should the nurse administer? 1.6 ml 25. A nurse is preparing to administer meperidine 75 mg IM stat. Available is meperidine injection 100 mg/mL. How many mL should the nurse administer? 0.75 ml