Potassium chloride with glucose and sodium chloride

How it works

It supplies maintenance fluid and electrolytes, replacing sodium and potassium while glucose provides water-free calories and supports cellular potassium uptake.

Prescribing in practice

• As a potassium-containing fluid it must be infused at a controlled rate via a ready-mixed bag and never bolused, since rapid potassium delivery can cause fatal arrhythmias.
• Avoid or use with caution in hyperkalaemia, renal impairment and with potassium-retaining drugs, monitoring potassium closely.
• Excess administration risks hyponatraemia from the relatively hypotonic glucose component and fluid overload, so match to the patient's daily requirements.

Monitoring

Monitor serum sodium and potassium, blood glucose and fluid balance during maintenance infusion.

Counselling the patient

• Explain this is a maintenance drip providing fluid, salts and sugar.
• Report palpitations, confusion or swelling during the infusion.

Evidence & guidelines

Pre-mixed potassium-glucose-sodium chloride solutions are recommended for routine maintenance to standardise electrolyte delivery and avoid bedside addition of potassium.