A nurse is reconstituting a vial of powdered penicillin for IM injection. The label states to add 6.2 mL of sterile water to yield 500 mg/mL. The order is for 250 mg IM. How many mL should the nurse administer?
0.5 mL
0.25 mL
0. 2 mL
0. 1mL
The Correct Answer is A
Identify the ordered dose and available concentration
Ordered Dose: 250 mg
Available Concentration: 500 mg/mL
Calculate the volume to administer
Volume to administer = Ordered Dose ÷ Concentration
Volume to administer = 250 ÷ 500
= 0.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The conversion factor
1 g = 1000 mg
Convert 1.5 g to milligrams
Milligrams = 1.5 × 1000
= 1500 mg
Correct Answer is C
Explanation
Identify the ordered dose and tablet strength
Ordered Dose: 5 mg
Tablet Strength: 2.5 mg per tablet
Calculate the number of tablets to administer
Number of Tablets = Ordered Dose ÷ Tablet Strength
Number of Tablets = 5 ÷ 2.5
= 2
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