Can someone help me figure this out?

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Motrin drops are available in a concentration of 100mg/2ml. The physician ordered Motrin ½ teaspoon for a temperature >101. The dosage is safe. How many ml should the nurse administer? How many mg of Motrin in this amount?

Please help I can not figure this out to save my life. Thank you. 

On 6/16/2022 at 3:53 PM, nadenka said:

I stupidly did 2.5/100X2ml= 0.05 then couldn't figure out at all the last question. 

So it sounds like you already converted the 1/2 teaspoon into 2.5 ml. If I'm doing it correctly, I think there is some overthinking happening. You already know the order is for 2.5ml (aka 1/2 teaspoon). 

If the concentration is every 2 ml there is 100mg (or for every 1ml there is 50mg) then every 0.5ml is 25mg.. you can just add it up. 

I've never seen a med math equation like this though.. they should represent real-life scenarios. Not sure they were trying to make it easier or harder for you all.

Your equation should work if you flipped the concentration on the bottom around.

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On 6/16/2022 at 3:27 PM, faithjohn said:

Just my take

1. How many ml's are there in 1 teaspoon? 5ml; in 1/2 teaspoon? 2.5mls

2. Always figure out what the ordered dose is. Then use the formula. 

the ordered dose is 2.5mls (1/2 tsp)

Formula = ordered dose/concentration (when reducing concentration to every 1ml)

100mg/2ml = 50mg/1ml

2.5ml/50mg = 0.05ml (in mls because were multiplying by 1ml )

If they want to know how many milligrams in 1/2 tsp (2.5mls)?

2.5ml x 50mg = 125mg

in .05mls? 

 .05ml x 50mg = 2.5mg

Anyone can feel free to correct me.

You were CORRECT! thank you 

 

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@nadenka, two members provided you the answer.  However, if you have to work this type problem again, do you think you can do so?

Best wishes.

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On 6/16/2022 at 9:31 AM, nadenka said:

Motrin drops are available in a concentration of 100mg/2ml. The physician ordered Motrin ½ teaspoon for a temperature >101. The dosage is safe. How many ml should the nurse administer? How many mg of Motrin in this amount?

Please help I can not figure this out to save my life. Thank you. 

You should have included your work here. I will do it but not explaining it.

1tsp=5mL

(2.5mL) (100mg/2mL)= 125mg 

(125mg)(2mL/100mg)= 2.5mL

 

 

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