ATI RN Pharmacology 2023 IV proctored exam
Calculation
A nurse is administering medications to a client who weighs 132 lb. The prescription reads chloramphenicol, 50mg/kg/day in 4 divided doses. Available is chloramphenicol 100 mg/mL. How many mL should the nurse give with each dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
mL
Explanation & Rationale
1 kilogram is approximately 2.2 pounds. The client weighs 132 lb, which is equivalent to 132 lb / 2.2 lb/kg = 60 kg. The prescription specifies a dosage of 50 mg/kg/day. For a 60 kg client, this is 50 mg/kg * 60 kg = 3000 mg/day. Since the medication is to be given in 4 divided doses, each dose should be 3000 mg/day / 4 doses/day = 750 mg/dose. The chloramphenicol is available at a concentration of 100 mg/mL, so the volume of each dose is 750 mg/dose / 100 mg/mL = 7.5 mL/dose. Rounded to the nearest tenth, the nurse should administer 7.5 mL with each dose.
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