drug calculations progress check

[petrit]

The maximum concentration of clarithromycin is 2ml/ml.

We have 500mg in a 10ml solution.

What volume of diluent will you need to add to make the solution safe

volume = 500mg/2ml= 250mg is that correct.

And do I have to divide the 250ml with 10 ml diluent

[Wuzzie]

The maximum concentration of clarithromycin is 2ml/ml.

We have 500mg in a 10ml solution.

What volume of diluent will you need to add to make the solution safe

volume = 500mg/2ml= 250mg is that correct.

And do I have to divide the 250ml with 10 ml diluent

You are getting volume and dose mixed up. If you have 500mg in 10ml then how many mg are in each ML?

[petrit]

50mg in 1ml

[petrit]

the concentration was 2mg/ml

[petrit]

volume= 500mg/2mg= 250mg

[petrit]

And do I have to divide the 250ml with 10 ml diluent

[NICUismylife, ADN, BSN, RN]

the concentration was 2mg/ml

You are misunderstanding the question. Always determine what is being asked.

The concentration you WANT it to be is 2mg/ml.

What you have is 500mg in 10mL

It is asking how much additional fluid you need to add to the 10ml to get the concentration to the desired 2mg/ml.

[Wuzzie]

You are misunderstanding the question. Always determine what is being asked.

The concentration you WANT it to be is 2mg/ml.

What you have is 500mg in 10mL

It is asking how much additional fluid you need to add to the 10ml to get the concentration to the desired 2mg/ml.

What she said. What you HAVE is 50mg/ml what you want is 2mg/ml.

[TheCommuter, BSN, RN]

Moved to the Nursing Student Assistance forum.

[petrit]

The question again

The maximum concentration of clarithromycin is 2mg/ml.

We have 500mg clarithromycin in a 10ml solution.

What volume of diluent will you need to add to make the solution safe.

2mg in 1ml=500mg in xml =250ml;

I thought 240ml diluent needed +10ml of the solution = 250ml total

[Wuzzie]

The question again

The maximum concentration of clarithromycin is 2mg/ml.

We have 500mg clarithromycin in a 10ml solution.

What volume of diluent will you need to add to make the solution safe.

2mg in 1ml=500mg in xml =250ml;

I thought 240ml diluent needed +10ml of the solution = 250ml total

Yay! You've got it. And good on you for catching the need to account for the 10ml!

[petrit]

thanks for your help Wuzzie

Kind regards Petrit