b. Convert the strength of the medication ordered and the medication stocked to
the same unit of measurement.
1 gm
= 0.2 gm
1000 mg
X mg
X = 200 mg
200 mg = 125 mg
4 ml
X ml
c. Cross-multiply.
200X = 500
d. Solve for "X." Label the answer.
X = 2.5 ml
NOTE: Round P.O. liquids to the nearest tenth place.
PRACTICE:
The physician has ordered KCL 40 mEq P.O. for your
patient. On hand is KCL 15 mEq per 5 ml. How many ml
will you administer?
SOLUTION:
15 mEq = 40 mEq
5 ml
X ml
15X = 200
X = 13.3 = 13.3 ml
PRACTICE:
The physician's order reads: Tylenol elixir gr V P.O. q
Tylenol elixir 60 mg per 0.5 ml. How many ml will you
administer?
MD0904
2-28