Basic Drug Calculations: Problem 1

1.  Ordered: Trilafon 24 mg po bid.
    Available: Trilafon concentrate labeled 16 mg/5 ml.
    How many ml will you administer?

Ratio-proportions:

24 mg : x  =  16 mg : 5 ml
16 x = 24 X 5 = 120
x = 120 ¸ 16
x = 7.5 ml

Formula method:

D/H X Q = X

24  X  5  = X
16
1.5 X 5 = 7.5 ml

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