Question

a nurse is preparing to administer erythromycin ethylsuccinate 800 mg po every 12 hr. available is erythromycin ethylsuccinate suspension 400 mg/5 ml. how many ml should the nurse administer per dose? (round the answer to the nearest whole number.)

Explanation:

Step1: Set up proportion

Let $x$ be the volume in mL. We have the proportion $\frac{400\ mg}{5\ mL}=\frac{800\ mg}{x\ mL}$.

Step2: Cross - multiply

$400x = 800\times5$.

Step3: Solve for $x$

$x=\frac{800\times5}{400}$.
$x = 10$.

Answer:

10