Question

The physician has ordered Lanoxin elixir 90 mcg p.o. daily. The available medication contains 0.05 mg/1 mL. How many mL will you administer?

Answer 1

To administer the prescribed 90 mcg of Lanoxin elixir, you will need to give 1.8 mL of the medication, which contains 0.05 mg of the drug per 1 mL.

Step-by-step explanation:

The student asked: how many mL of Lanoxin elixir should be administered if the physician has ordered 90 mcg p.o. daily and the available medication contains 0.05 mg/1 mL. To find the answer, you need to convert the order to milligrams and then use the concentration of Lanoxin in the elixir to calculate the volume. Since 1 mg equals 1000 mcg, we get the following:

90 mcg = 0.09 mg (because 90/1000 = 0.09)

Now, we use the concentration of the medication to find the volume:

0.05 mg is contained in 1 mL, so 0.09 mg will be contained in X mL.

By setting up a proportion, we find:

0.05 mg : 1 mL = 0.09 mg : X mL

X = (1 mL * 0.09 mg) / 0.05 mg

X = 1.8 mL

Therefore, you will administer 1.8 mL of Lanoxin elixir to meet the physician's order of 90 mcg.