Someone please help me with this Ped Dose Cal Problem

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I am practicing ped dose cal for when school opens next month and have been stomped on this question for an hour now and still trying to figure it out. PLEASE HELP!

The recommended dose of Gantrisin Pediatric Suspension is 150 mg/Kg PO in 4 doses daily

Gantrisin Pediatric Suspension 0.5 Gm/5ml

How many ml should be given for one dose for a 40 lb child

I will be soo grateful.

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This is your homework (or whatever, since school hasn't started :)).....

You can give a man a fish, and he eats for a day; you can teach a man to fish and he eats for a lifetime.....(not sure who said that- but I've heard it many times)

Keep working at it- it will come to you :)

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Start with the child's weight....get it converted to kg....

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This isn't homework, these are practice questions that I am trying to figure out. School hasnt started as yet so I dont have any homework. I know how to set up the problem but I am stumped at the gm/ml. So far I have 1 dose = 40lbs/4 doses x 1 kg/2.2lbs x 150mg/1kg now I am not sure whether I should then put 1gm/1000 mg x 5ml/0.5gm. Please help someone! I know that this is my work and my responsibilty, but I am just asking for some assistance in figuring out this problem. Some of you nurses on here are so unhelpful and feel as though us students just want a handout when most times we are just asking for help just like how you needed help when in nursing school. Its sad to see this.

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You are on the right track, convert your weight to kg and convert mg to g. Once you get that done I like to use the formula Desired amt/amt on hand * volume

If you can break down your math on a post and show what answer you came up with the others will probably be a little more helpful.

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Post your questions in the 'Student' section. People there are very helpful. I am still trying to figure this out myself, so can't help you at this stage.

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I am practicing ped dose cal for when school opens next month and have been stomped on this question for an hour now and still trying to figure it out. PLEASE HELP!

The recommended dose of Gantrisin Pediatric Suspension is 150 mg/Kg PO in 4 doses daily

Gantrisin Pediatric Suspension 0.5 Gm/5ml

How many ml should be given for one dose for a 40 lb child

I will be soo grateful.

40 pounds divided by 2.2= 18.2 kg

150mg x 18.2 kg=2730 mg (for whole day)

2730mg divided by 4 doses =683 mg/dose

1GM/10cc (I always round to 1 when I can)...or- .100mg/1cc

For 683mg, you need 6.8cc

Any others, if I made a mistake, let me know :)

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Specializes in Gerontological, cardiac, med-surg, peds.

Moved to Nursing Student Assistance Forum, as more appropriate forum.

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Specializes in LTC.
40 pounds divided by 2.2= 18.2 kg

150mg x 18.2 kg=2730 mg (for whole day)

2730mg divided by 4 doses =683 mg/dose

1GM/10cc (I always round to 1 when I can)...or- .100mg/1cc

For 683mg, you need 6.8cc

Any others, if I made a mistake, let me know :)

I got the same answer. Ofcourse I had to do mine the long way but, there are several ways to get to grandmas house.

The only thing I did different was to convert mg to grams. I converted 683mg to 0.683 GM. Then I did 0.683GM X 5ML / 0.5GM which is 6.8 cc.

Don't forget to always convert, a lot people forget to convert lbs to KG and other conversions. When I take my Calc exams I always break up the problem ( see below), I use this format and have gotten A's on these exams.

Break down of problem:

1. Write out the order

2. Write what is available

3. Write what conversions are needed to solve the problem. EX. lbs to kg or mg to Gm

4. Write what is the question asking for

5. Set up problem. Put order over what is on hand then proceed with any conversions needed. Make sure all units cancel out so that you end up with units needed. If answer asks for ml/hr make sure you have that in your answer.

Good luck.

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Great. I got 6.75 ml, so I guess rounded off it's 6.8ml. I can not believe that I managed to get the correct answer. I always struggled with calculations, until last week when I watched an excellent dvd by Kaplan on Dosage and calculation. It helped me so much!

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Thank you sooo much. That is the answer that I came up with but wasnt quite sure. You guys ROCK!

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Specializes in Emergency; med-surg; mat-child.

FWIW, you probably wouldn't round a peds dose, especially if it's on a pump. They'll toss those things at you on a dosage calc test to make sure you're reading directions.

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