Reconstitution dosage problem

Think it out a little.

you want to give 250 mg and every mL has 330 mg right? so without any math at all you should know that you are going to give less than 1 mL.

I can't even attempt to figure out where you got 350 mg x 3 mL??? but 2.27 mL would be 749 mg.

Think it out a little.

you want to give 250 mg and every mL has 330 mg right? so without any math at all you should know that you are going to give less than 1 mL.

I can't even attempt to figure out where you got 350 mg x 3 mL??? but 2.27 mL would be 749 mg.

okay, so it was 0.76 ml. I misread the question. thanks

By the way, how do you do a question like this:

"The physician orders Mandol 500 mg IM stat. The 1 Gram vial that is available has the following directions for reconstitution. "Add 3 mL of an approved diluent. Provides an approximate volume of 3.5 mL" How many ml will you administer?

I am confused at this particular one, it doesn't provided me the me the mg after dilution.

If it is a 1 gram vial it doesn't matter how much dilutent you add, it will still be 1 gram. Diluting it doesn't change how many grams are in the bottle.

But how many would you administer...am sure not 1g..so DA comes into play

By the way, how do you do a question like this:

"The physician orders Mandol 500 mg IM stat. The 1 Gram vial that is available has the following directions for reconstitution. "Add 3 mL of an approved diluent. Provides an approximate volume of 3.5 mL" How many ml will you administer?

I am confused at this particular one, it doesn't provided me the me the mg after dilution.

1 g = 1000 mg so 1000 mg / 3.5 mL = 286 mg per Ml

500 / 286 = 1.75 mL

which makes perfect sense --> 500 mg is 1/2 of 1 g... so we know before we start the problem that we are going to give half the solution... 3.5 mL / 2 = 1.75 mL

the real secret to medical math is do not make it harder than it needs to be :)

Read the question and change it into more familiar units. So:

"The physician orders Mandol 500 mg IM stat. The 1 Gram vial that is available has the following directions for reconstitution. "Add 3 mL of an approved diluent. Provides an approximate volume of 3.5 mL" How many ml will you administer?

"You need to get 500 jellybeans for your third grader's picnic stat! You go to the candy store, and they have bags that have 1000 jellybeans in 3 1/2 quart bags. You buy a bag. How do you know how to get 500 jellybeans out of the bag?"

If you can't see that 500 jellybeans is half of 1000 jellybeans, so you just need to divide the total volume in the bag by 2, well, I can't make it any more clear.

But how many would you administer...am sure not 1g..so DA comes into play

All you need to do is divide the volume by 2. You have 1000 mg in 3.5 mL, you want to give 500 mg so you give half of 3.5 mL since 500 is half of 1000.