Question

• order: lanoxin (digoxin) 250 mcg by po q am
• supply: the label reads 0.125 mg per tablet
• how many tablets will you give? ________

Explanation:

Step1: Convert units

First, convert 250 mcg to mg. Since 1 mg = 1000 mcg, then 250 mcg=$\frac{250}{1000}$mg = 0.25 mg.

Step2: Calculate number of tablets

Let the number of tablets be $n$. We know that the amount per tablet is 0.125 mg. Using the formula $n=\frac{\text{Required dose}}{\text{Dose per tablet}}$, we have $n=\frac{0.25}{0.125}$.
$n = 2$.

Answer:

2