Question

Digoxin (Lanoxin) is available for parenteral pediatric use in a concentration of 0.1 mg/mL. How many milliliters would provide a dose of 40 μg?

Answer 1

Answer:

0.4mL would provide a dose of 40 μg.

Step-by-step explanation:

The problem states that the Digoxin (Lanoxin) is available for parenteral pediatric use in a concentration of 0.1 mg/mL. And asks how many milliliters would provide a dose of 40 μg?

The first step is the conversion of 0.1mg to ug.

Each mg has 1000 ug, so:

1mg - 1000ug

0.1mg - xug

x = 1000*0.1

x = 100ug

So the concentration of the Digoxin that is available for parenteral pediatric use is 100ug/mL. How many mL would provide a dose of 40ug.

As the number of mL increases, so does the size of the dose(ug). It means that there is a direct relationship between the measures, and we have a direct(cross multiplication) rule of three. So

1mL - 100ug

xmL - 40ug

100x = 40

$x = \frac{40}{100}$

x = 0.4mL

0.4mL would provide a dose of 40 μg.