ATI Medication Administration (Dosage Calculation) Questions And Answers

ATI Medication Administration
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(Dosage Calculation) Questions
And Answers

A nurse is preparing to administer codeine 20 mg PO every 6 hr PRN
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pain. Available is codeine oral solution 10 mg/ 5 mL. How many mL
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should the nurse administer per dose?
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(Round to the nearest whole number. Use a leading zero if it applies.
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Do not use a trailing zero.) - (correct answer) -Answer: 10 mL
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Follow these steps for the Ratio and Proportion method of
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calculation:
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Step 1: What is the unit of measurement the nurse should calculate?
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mL
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Step 2: What is the dose the nurse should administer? Dose to
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administer = Desired 20 mg
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Step 3: What is the dose available? Dose available = Have 10 mg
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Step 4: Should the nurse convert the units of measurement? No
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Step 5: What is the quantity of the dose available? 5 mL
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Step 6: Set up an equation and solve for X.
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Have/Quantity = Desired/X ji ji




10 mg/ 5 mL = 20 mg/ X mL
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X mL = 10 mL
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Step 7: Round if necessary.
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,Step 8: Determine whether the amount to administer makes sense. If
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there are 10 mg/5 mL and the prescription reads 20 mg, it makes
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sense to administer 10 mL. The nurse should administer codeine oral
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solution 10 mL PO every 6 hr PRN pain.
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A nurse is preparing to administer eszopiclone 2,000 mcg PO to a
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client. How many mg should the nurse administer?
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(Round to the nearest whole number. Use a leading zero if it applies.
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Do not use a trailing zero.) - (correct answer) -Answer: 2 mg
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Follow these steps for the Ratio and Proportion method of
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calculation:
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Step 1: What is the unit of measurement the nurse should calculate?
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mg
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Step 2: What is the dose the nurse should administer? Dose to
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administer = Desired 2,000 mcg
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Step 3: What is the dose available? Dose available = Have 1 mg
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Step 4: Should the nurse convert the units of measurement? Yes (mcg
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does not equal mg)
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1,000 mcg/1 mg = 2,000 mcg/X mg ji ji ji ji ji ji




X mg = 2 mg
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Step 5: Round if necessary.
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Step 6: Determine whether the amount to administer makes sense. If
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the prescription reads 2,000 mcg and 1,000 mcg equals 1 mg, it
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makes sense to administer 2 mg. The nurse should administer
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eszopiclone 2 mg PO.
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A nurse is preparing to administer tobramycin 4 mg/kg/day IM divided
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in three equal doses to a patient who weighs 60 kg. Available is
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tobramycin 40 mg/mL. How many mL should the nurse administer per
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dose?
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, (Round to the nearest whole number. Use a leading zero if it applies.
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Do not use a trailing zero.) - (correct answer) -Answer: 2 mL
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Follow these steps for the Ratio and Proportion method of
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calculation:
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Step 1: What is the unit of measurement the nurse should calculate?
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mg
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Step 2: Set up an equation and solve for X.
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X = Dose per kg × Client's weight in kg
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X mg = 4 mg/kg × 60 kg
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X mg = 240 mg
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The dose is divided into three equal doses; therefore, divide X by 3.
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240 mg = 80 mg3 ji ji ji ji




Step 3: What is the unit of measurement the nurse should calculate?
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mL
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Step 4: What is the dose the nurse should administer? Dose to
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administer = Desired 80 mg
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Step 5: What is the dose available? Dose available = Have 40 mg
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Step 6: Should the nurse convert the units of measurement? No
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Step 7: What is the quantity of the dose available? 1 mL
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Step 8: Set up an equation and solve for X.
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Have/Quantity = Desired/X ji ji




40 mg/1 mL = 80 mg/X mL
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X mL = 2 mL
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Step 9: Round if necessary. ji ji ji ji




Step 10: Determine whether the amount to administer makes sense.
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If there are 40 mg/mL and the prescription reads 4 mg/kg/day divided
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