Question

The physician ordered 0.4 ml of potassium iodide (iostate) expectorant. the label reads 325 mg/tsp. how many milligrams are contained in this dose?

Answer 1

To find out how many milligrams of potassium iodide are in a 0.4 ml dose, convert the volume to teaspoons using the given dosage concentration, resulting in 26 milligrams of potassium iodide for the dose.

Step-by-step explanation:

To calculate the number of milligrams of potassium iodide (iostate) expectorant in a 0.4 ml dose, we need to convert the volume from milliliters to teaspoons, since the concentration is given in mg per teaspoon.

First, we need to know that there are 5 ml in a teaspoon. Hence, to find out how many milligrams are in 0.4 ml we use the proportion:

If 5 ml = 325 mg,
Then 0.4 ml = X mg

Where X is the mg of the substance that we want to find. We do the cross-multiplication to solve for X:

5 ml * X mg = 0.4 ml * 325 mg
X = (0.4 ml * 325 mg) / 5 ml
X = 130 mg / 5
X = 26 mg

So, 26 milligrams of potassium iodide are contained in a 0.4 ml dose.

Answer 2

One teaspoon is equivalent to 4.92892 milliliters which is very close to 5 milliliter. So the computation would be dividing the 325 milligrams to the 1 teaspoon then multiplying it to 1 teaspoon divided by 5 milliliters then multiplying that to the 0.4 milliliter of potassium iodide.

Milligrams contained = (325 mg / 1 tsp) x (1 tsp / 5 mL) x 0.4 mL = 26 milligrams is the answer.