Sodium Chloride is an essential inorganic salt, a combination of sodium (Na+) and chloride (Cl-) ions. It is a fundamental physiological component, constituting the primary solute in extracellular fluid. In clinical pharmacology, it is used as an electrolyte replenisher, a source of water and ions for hydration, a diluent for other parenteral drugs, and a vehicle for irrigation and inhalation solutions. It is the cornerstone of intravenous fluid therapy in India, critical for managing dehydration, hypovolemic shock, and electrolyte imbalances.
Adult: Highly individualized based on clinical condition. For fluid resuscitation: 1-2 L of 0.9% NaCl rapidly (e.g., 20 mL/kg in shock). For maintenance: 1.5-3.0 L/day (approx. 25-30 mL/kg/day). For hyponatremia: Dose calculated based on sodium deficit: Na deficit (mEq) = 0.6 * body weight (kg) * (desired Na - current Na). Administer correction slowly to avoid osmotic demyelination.
Note: For IV infusion: Use aseptic technique. 0.9% NaCl is compatible with most IV lines and many drugs (check Y-site compatibility). Infusion rate is dictated by clinical condition—rapid for resuscitation (e.g., 999 mL/hr via infusion pump), slow for maintenance. Do not use if solution is discolored or contains particulate matter. For irrigation: Use sterile, non-pyrogenic solutions.
Sodium chloride, when administered, increases the osmolality of plasma and extracellular fluid. Sodium is the primary determinant of extracellular osmolality and plasma volume. Chloride helps maintain electroneutrality and is involved in acid-base balance. As a crystalloid, it distributes freely throughout the extracellular compartment, expanding plasma volume by drawing water from the intracellular and interstitial spaces via osmosis.
Pregnancy: US FDA Pregnancy Category C (for injectable). Sodium chloride crosses the placenta. Use is generally considered safe when used appropriately for maternal indications (e.g., dehydration, pre-eclampsia management). However, excessive use can lead to maternal and fetal fluid overload. Monitor electrolytes.
Driving: No effect on driving ability.
| Corticosteroids (e.g., Prednisolone, Hydrocortisone) | Increased sodium retention, potentiating risk of edema and hypertension. | Moderate |
| Lithium Carbonate | Increased sodium excretion can reduce lithium clearance, increasing risk of lithium toxicity. Sodium chloride administration can normalize lithium clearance. | Major |
| Potassium-Sparing Diuretics (e.g., Spironolactone, Amiloride) | Concurrent use can lead to hyperkalemia, especially in renal impairment. | Moderate |
| ACE Inhibitors (e.g., Enalapril, Ramipril) | May reduce aldosterone, impairing renal sodium excretion, increasing risk of hypernatremia. | Moderate |
| NSAIDs (e.g., Ibuprofen, Diclofenac) | Promote sodium and water retention, increasing risk of edema and hypertension. | Moderate |
Same composition (Sodium Chloride (NA)), different brands: