A nurse is preparing to administer perphenazine 0.032 g PO divided in four equal doses daily to a client who has psychosis. Available is perphenazine oral solution 16 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["2.5"]
Step by step calculation:
Determine the total daily dosage in grams: 0.032 g
Convert grams to milligrams:
0.032 g×1000 mg/g=32 mg
Divide the total daily dose into four equal doses:
Dose per administration=32 mg/4=8 mg
Determine the concentration available: 16 mg/5 mL
Use the formula:
Volume (mL)=Required dose/(mg)Concentration (mg/mL)
First, find the mg/mL concentration:
16 mg/5 mL=3.2 mg/mL
Now calculate the volume:
Volume (mL)=8 mg/3.2 mg/mL
Volume (mL)=2.5
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.75"]
Explanation
Step by step calculation:
Determinethedosagerequired:234mg
Determinetheconcentrationavailable:273mg/0.875mL
Usetheformula:
Volume(mL)=Requireddose/(mg)Concentration(mg/mL)
First,findthemg/mLconcentration:
Concentration(mg/mL)=273mg/0.875mL=312mg/mL
Nowcalculatethevolume:
Volume(mL)=234mg/312mg/mL
Volume(mL)≈0.75
Correct Answer is ["1.3"]
Explanation
Step by step calculation:
Determinethedosagerequired:200mg
Determinetheconcentrationavailable:150mg/mL
Usetheformula:
Volume(mL)=Requireddose/(mg)Concentration(mg/mL)
Volume(mL)=200mg/150mg/mL
Calculatethevolume:
Volume(mL)=1.333
Roundtothenearesttenth: 1.3mL
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