Dosage Question: Parenteral Drugs w/ Reconstituted solution

[Roxy512]

help! i cannot find a sample problem of this kind anywhere in my books. please help by showing how to set the problem up. thank you!!

you have an order for drug x 125 mg im four times a day. you have a 5ml vial containing 1 g of drug x in powder form. the directions read: "ad 1.5 ml diluent to yield 2 ml reconstituted solution." how many ml will you give?

(answer is .25 ml)

[Boog'sCRRN246, RN]

How have you tried setting it up so far?

[Mike R, ADN, BSN, RN]

help! i cannot find a sample problem of this kind anywhere in my books. please help by showing how to set the problem up. thank you!!

you have an order for drug x 125 mg im four times a day. you have a 5ml vial containing 1 g of drug x in powder form. the directions read: "ad 1.5 ml diluent to yield 2 ml reconstituted solution." how many ml will you give?

(answer is .25 ml)

would you agree that if you dilute the powder, you'll have 1g of drug in 2ml?

given that, you can setup your equation:

ml= 2ml/1g x 1g/1000mg x 125mg= 250/1000= 0.25ml of drug x each dose.

i hope that makes sense.

[Suethestudent]

Mike R is correct

Order =125mg (frequency is irrelevant)

Available = 2mls containing 1g thus 2mls=1g is an equivalence to use

1g=1000mg is a conversion factor to use to cancel out mgs and gs

125mg x 2mls/1g x 1g/1000mg = 0.25mls

[Suethestudent]

Hope that helped