Question

1. mr. wang has rheumatoid arthritis and has decadron 1 mg po q6h ordered. you have decadron elixir 0.5 mg/5 ml.

a) how many milliliters will you administer per dose?

Explanation:

Step1: Set up proportion

Let \(x\) be the volume to administer. We know that the concentration is \(0.5\) mg per \(5\) mL. The formula is \(\frac{\text{Desired dose (mg)}}{\text{Available dose (mg)}}=\frac{x(\text{mL})}{\text{Volume of available dose (mL)}}\). Here, desired dose \(= 1\) mg, available dose \(=0.5\) mg, volume of available dose \(=5\) mL. So \(\frac{1}{0.5}=\frac{x}{5}\).

Step2: Solve for \(x\)

Cross - multiply: \(0.5x = 1\times5\). Then \(x=\frac{5}{0.5}\).

Answer:

\(10\) mL