Question

Ampicillin 250 mg IM every 12 hours is ordered. After reconstitution, there's 125 mg/mL. How many mL would you give?

A. 20 mL
B. 10 mL
C. 2 mL
D. 125 mL

Answer 1

Correct choice is C. 2 mL.

Explanation:

Given that Ampicillin 250 mg IM every 12 hours is ordered. After reconstitution, there's 125 mg/mL. Now we need to find about how many mL would you give.

Let number of ml needed = x.

Since ratio of mg per mL will be fixed so we get equation:

`(mL)/(mg)=(x)/(250)=(1)/(125)`

`(x)/(250)=(1)/(125)`

`x=(1)/(125) * 250`

`x=(250)/(125)`

`x=2`

Hence correct choice is C. 2 mL.