Question

a nurse is preparing to administer cephalexin 500 mg po every 6 hr. available is cephalexin suspension 250 mg/5 ml. how many ml should the nurse administer per dose? (round the answer to the nearest whole number. use a leading zero if it applies. do not use a trailing zero.)

Explanation:

Step1: Set up proportion

Let $x$ be the volume in mL. The proportion is $\frac{250\ mg}{5\ mL}=\frac{500\ mg}{x\ mL}$.

Step2: Cross - multiply

$250x = 500\times5$.

Step3: Solve for $x$

$250x=2500$, so $x=\frac{2500}{250}=10$.

Answer:

10