Child's dose math/ tablets (2)

by Akika
(Houston, TX)

I don't even understand where to begin! lol

1)A child's dose for cefadroxil is 30 mg/kg body weight once a day for 14 days. What is the smallest bottle that will provide enough medication to last 14 days if the child weighs 44 pounds?

2)The doctor changes a prescription for 150 ml of amoxicillin 250 mg/ 5 ml to 250 mg chewable tablets. How many many chewable tablets should be dispensed?

I'm sure I'm just confusing myself... I was thinking 30 for the second answer by dividing 250 mg by 5 ml and I was right, but I just wanted make sure I was doing it the right way.

Comments for
Child's dose math/ tablets (2)

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Dec 22, 2011
 Rx Dosage
by: Az

First kg to pounds:
44*0.454=19.976

1. Its not kg to pounds but pounds to kg conversion.
2. Never first divide 1/2.2 and get that .454 \
instead do it like this
44kg*1/2.2lbs = 20kg get a clean cut figure of 20kg and not 19.976.
3. Your final answer will be 8400mg not what u have.
Aug 23, 2011
 #1
by: MTL

First kg to pounds:
44*0.454=19.976

Next how many mg for 1 day? 30mg for every kg per day:
19.976*30=599.28

Then the amount for 1 day times 14 days:
599.28*14=8389.92mg

So the bottle needs to hold at least 8389.92mg
Aug 10, 2011
 Ohhh!!!
by: Anonymous

Thank you!
Aug 06, 2011
 30 TABS
by: Anonymous

It is wrong way. First, 150ml contain 7500mg amoxicillin.
250*150/5=7500mg.
7500mg/250mg/tab= 30tabs

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