Dextrose 70% and Dextrose 5% Compounding ALLIGATION Question

Dextrose Chemical Structure

Dextrose Chemical Structure

A pharmacist asks you to compound 1 Liter of Dextrose 30%. You have on hand Dextrose 70%, and Dextrose 5%. How many ml of each must be used to compound this solution?


You would use an Alligation to solve this pharmacy math problem.

70%------25 parts 70%
5%-------40 parts 5%

Divide 25 by 65 (25 + 40) and you get a total of 0.384

Multiply this by 1000 and you get 384 ml of the 70% solution.

Divide 40 by 65 and you get .616 Multiply this by 1000 and you get 616 ml of the 5% solution.

Thanks for your question!

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Dextrose for Injection
by: David

An IV of Dextrose will assist with getting a patient hydrated and provides calories. Dextrose is Glucose, a form of sugar.

Dextrose 70% contains the minimum volume of fluid to get the highest amount of calories. There are 2380 calories per 1 Liter of Dextrose 70%.

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