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?
#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.
locolorenzo22, BSN, RN
2,396 Posts
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.