Help with Math, Please.....

Nurses General Nursing

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Hi how is everyone doing? I am praticing some clinical dosage math problems, and have encountered trouble with two. I have been trying to solve them for a long period of time, but just don't get to the solution. Is it possible, if someone can tell me if I got the right answers. Thanks!!!!

-A patient is to receive Phenergen elixer 25 mg. The bottle is labeled 10mg per tsp. How many milliters should be given?

What I got:2.5?

-Penicillin G Sodium for injection contains 200,000 Units per milliliter. How manu units would there be in 2.5 mL?

What I got:100,000?

Specializes in Ortho, Neuro, Detox, Tele.

correct. if you have 10mg per teaspoon, you MUST know the conversion factor. 5mLs = 1 teaspoon. So for 25 you have to give 12.5 mL.

setup like 10mg/1 tsp x 25mg/x tsp = 2.5tsp x 5ml/1 tsp = tsp cancel and you have 12.5mLs.

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Specializes in Acute Care, Rehab, Palliative.

#1 asks how many mls you would give. It states there are 10mg per teaspoon. One teaspoon equals 5 mls so you have 10mg/5ml.You would give 12.5 mls for a dose of 25mg.

The question asks for how many mls you would give so you can't give the answer in teaspoons.

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