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Discussion

Dosage question help

So I'm trying to brush up on my math skills and I just have a few questions.

1. Ampicillin 1.5g in 100ml 0.9% ns over 45 mins. What is ml/hr. I got 133ml/hr the worksheet answer has 125ml/hr.

2. Zosyn 2g in 100ml DW5 over 40 min. What is the ml per hr. I got 150ml/hr the answer says 143.

3. They doc orders phenobarbital 5mg/day every 12hrs. The pt weighs 25lbs. Available you have phenobarbital 25mg/5ml. How many ml do you administer per dose. So I'm having a bit of a hard time figuring out why I don't divide by 2 since it says 12hrs.

Any help would be greatful.

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    Just make fractions out of the numbers and solve for X.

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    Hi there - so you wanted to know about your 3 calculations: Your first two answers were correct. The answers that the book (or other) supplied was incorrect. What was your answer and theirs in no. 3?

    [email protected]

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    I never got a clear answer on if the worksheet wording is incorrect but I got 11.4 or 5.7 if I divide by 2.

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