The nurse is to administer digoxin to an 18-month-old patient who weighs 16.5 lb. Guidelines for administration read as follows: 0.0075 to 0.010 mg/kg/day. Which is a safe medication dosage?
a. 0.05 mg
b. 0.12 mg
c. 0.074 mg
d. 0.75 mg
ANS: C
16.5 lb converts to 7.5 kg; 7.5 kg ? 0.0075 mg = 0.05625; 7.5 kg ? 0.010 mg = 0.075 mg; 0.074 mg is the only answer within the safe dosage range. Values of 0.05 mg, 0.12 mg, and 0.75 mg are too large.
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