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Saline IV fluid / replacement

Sodium chloride

Used in: Hyponatraemia

Sodium chloride solution is a crystalloid fluid used intravenously for fluid resuscitation, replacement of fluid and electrolyte losses, and as a vehicle for drug administration, as well as topically for irrigation.

Dosing — being independently re-sourced

ClinCalc Pro is rebuilding its dose data from primary open sources — the manufacturer SmPC (eMC), the WHO Model Formulary and other official references — under clinician review. This drug's structured dose is not yet published here. Confirm all doses against the product SmPC and your local formulary before prescribing.

Clinical monograph

How it works

It supplies sodium and chloride ions and water to expand the extracellular fluid compartment and correct or maintain fluid and electrolyte balance.

Prescribing in practice

  • Excessive or rapid administration can cause fluid overload, hypernatraemia and hyperchloraemic acidosis, so assess fluid status and use cautiously in cardiac or renal impairment.
  • Concentration and rate must be selected for the indication, with hypertonic solutions requiring particular care and monitoring.
  • Prescribe intravenous fluids in line with NICE guidance on assessment of fluid and electrolyte needs.

Monitoring

Monitor fluid balance, serum electrolytes and clinical status, particularly with prolonged or high-volume infusion.

Counselling the patient

  • This is a salt-water fluid given through a drip to keep you hydrated or replace fluid losses.
  • The clinical team will check your fluid balance and blood tests during treatment.
  • Tell staff if you notice swelling or breathlessness.

Evidence & guidelines

NICE guidance on intravenous fluid therapy informs the safe prescribing of sodium chloride solutions for fluid and electrolyte management.

Reference: NICE CG174; SSC; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.

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