glucose + potassium chloride + sodium chloride: clinical use

Prescribing considerations

• Individualise fluid selection and administration according to clinical condition, concurrent therapy, electrolyte status and glucose handling.
• Use particular caution with cardiac or renal impairment, diabetes, hypertension, oedema, pre-eclampsia, acute dehydration, extensive tissue injury and raised vasopressin states.
• Assess malnourished patients for refeeding risk.
• Glucose is derived from corn; consider hypersensitivity in people with known corn allergy.
• Confirm compatibility before adding medicines; amphotericin B and dobutamine are listed as incompatible.

Contraindications and cautions

• Hypersensitivity to the product.
• Hyperkalaemia or hyperchloraemia not explained by concentration from volume depletion.
• Severe renal insufficiency with oliguria or anuria.
• Uncompensated or severe congestive heart failure, or fluid and sodium retention.
• Addison's disease.
• Acute ischaemic stroke or head trauma within the first 24 hours.
• Uncompensated diabetes, hyperglycaemia, hyperosmolar coma, hyperlactataemia or other known glucose intolerance.

Monitoring

• Fluid balance and urine output.
• Serum sodium, potassium, chloride, glucose and other relevant electrolytes.
• Renal function and acid–base status.
• ECG when clinically warranted.
• Infusion site and equipment for phlebitis, extravasation, free flow or air-entry risk.

Clinical pharmacology

The solution delivers fully bioavailable glucose and electrolytes intravenously. Potassium distributes mainly inside cells and is predominantly eliminated by the kidneys; sodium and chloride mainly occupy extracellular fluid. Glucose is metabolised under insulin regulation, leaving fluid that may become physiologically hypotonic.

Formulation and product differences

• A premixed, clear, sterile solution in flexible infusion bags, with water for injections as the only excipient.
• Its low-sodium, glucose-containing composition differs from saline-based potassium infusions and other glucose–electrolyte strengths; products are not interchangeable.
• The unopened solution is slightly hypertonic, but glucose metabolism can make it markedly hypotonic in vivo.
• For single use only; solutions containing additives should normally be used immediately after compatible aseptic preparation.