Questions: 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.) mL

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.)
mL

Transcript text: A nurse is preparing to administer erythromycin ethylsuccinate 800 mg PO every $\mathbf{1 2} \mathbf{~ h r}$. Available is erythromycin ethylsuccinate suspension 400 $\mathrm{mg} / 5 \mathrm{~mL}$. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number.) $\square$ mL

Solution

Solution Steps

Step 1: Understand the Problem

The nurse needs to administer 800 mg of erythromycin ethylsuccinate every 12 hours. The available suspension has a concentration of 400 mg per 5 mL. We need to determine how many milliliters (mL) of the suspension should be given per dose.

Step 2: Set Up the Proportion

To find out how many mL correspond to 800 mg, we can set up a proportion based on the given concentration:

\[ \frac{400 \, \text{mg}}{5 \, \text{mL}} = \frac{800 \, \text{mg}}{x \, \text{mL}} \]

Step 3: Solve the Proportion

Cross-multiply to solve for $x$:

\[ 400 \times x = 800 \times 5 \]

\[ 400x = 4000 \]

\[ x = \frac{4000}{400} = 10 \]