A pediatrician prescribed 70 mg of Dilantin® to be administered orally. This dose contains 50 mg of Dilantin® per 5 mL. Therefore, how many milliliters of this suspension must be administered?

3 mL
5 mL
7 mL
9 mL

7 mL

Rationale: 7 mL of Dilantin® must be administered. This can be solved by using the proportion: 50 mg/5 mL = 70 mg / X mL.

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