Answer
It replaces water, potassium, sodium and chloride while supplying glucose when an energy source is needed.
Sources for this answer
- Potassium Chloride 0.15 % w/v, Sodium Chloride 0.18 % w/v and Glucose 4% w/v, Solution for Infusion — 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.