A 6-year-old child weighing 60 pounds has been prescribed oral digoxin (Lanoxin) 30 mcg/kg as a loading dose. How many milligram will she be given?
A) 0.218 mg
B) 0.418 mg
C) 0.618 mg
D) 0.818 mg
D
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First, using the formula: 2.2 pounds and 60 pounds: multiplied by kg, determine the child's weight in kg (60/2.2 = 27.27 kg). Next, using the formula: amount of drug prescribed times weight in kg, determine the dose in mcg the child should receive (30 multiplied by 27.27 = 0.818 mcg). Then to determine the amount of mg the child should receive, use the formula: 1 mg: 1,000 mcg = X mg: 818 mcg (818/1,000 = 0.818 mg).
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