A health care provider prescribes 50 mg of a drug. The drug is only available in a 20 mL vial that contains 20 mg/mL of the drug. How much solution must the nurse administer for each dose?
a. 2.5 mL c. 5 mL
b. 25 mL d. 0.25 mL
ANS: A
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A Correct: 50 (prescribed dose) is divided by 20 (on-hand dose) and multiplied by 1 mL = 2.5 mL.
B Incorrect: This would yield 10 times the prescribed dose.
C Incorrect: This would yield twice the prescribed dose.
D Incorrect: This would yield a 5 mg dose.
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