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The child weighs 18.7 pounds. The order is Penicillin 25 mg/Kg q12 hr. The maximum safe...

The child weighs 18.7 pounds. The order is Penicillin 25 mg/Kg q12 hr. The maximum safe dose is 40 mg/Kg/day. The pharmacy supplies Penicillin 1 Gm vials with directions to add 9 mL in order to yield a concentration of 200 mg = 2 mL.

What is the dosage per dose ?

How many ml will you draw up per dose? Use a 3ml syringe

Is the order safe?

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Answer #1

100 mg/mL is the concentration as directed.

18.7 pound = 8.48 kgs.

25 mg/kg q12h is the order.

25 x 8.48 = 212 mg q12h.

So, 424 mg/ day is the order.

Safe dose is 40 mg/kg/day.

So, 40 x 8.48 = 339.2 mg/day.

Per dose 212 mg is required.

Concentration is 100 mg/mL. Therefore 2.12 ml is required per dose.

No, the order is not safe because it exceeds the safe range that is approximately 340 mg/day and the order is 424 mg/day.

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