Answer
It replaces water, sodium chloride and carbohydrate when someone is dehydrated or has low circulating blood volume and adequate intake by normal routes is restricted.
Sources for this answer
- Sodium Chloride 0.45 % w/v and Glucose 2.5% w/v Solution for Infusion BP — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.