The nurse must administer Digoxin 0.125 mg IV. The medication is available in ampules that are labeled "Digoxin 500 mcg/2 mL." How many milliliters of drug should be administered?
a. 0.25 mL c. 4 mL
b. 0.5 mL d. 40 mL
ANS: B
Feedback
A Incorrect: This is too small a dose.
B Correct: Convert 0.125 mg to 125 mcg, then divide by 500 mcg = 0.25 times 2 mL = 0.5 mL
C Incorrect: This is an excessive dose. Remember the prescribed dose is less than (1/4 of) the on-hand dose so the volume must be 1/4 of the on-hand volume.
D Incorrect: This is an excessive dose. Remember the prescribed dose is less than (1/4 of) the on-hand dose so the volume must be 1/4 of the on-hand volume.
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