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# Normal Saline (0.9% Sodium Chloride) ## Overview Normal saline (0.9% sodium chloride) is an isotonic crystalloid solution used for fluid and electrolyte replacement. ## Primary Indications * Volume resuscitation in hypovolemia, shock, and hemorrhage. * Maintenance of hydration. * Diluent for IV medications. * Treatment of hypernatremia (with caution and gradual correction). * Wound irrigation and bladder irrigation. ## Adult Dosing * **Resuscitation:** Bolus of 1-2 liters intravenously (IV) as rapidly as tolerated. Subsequent doses depend on clinical response and hemodynamic parameters. * **Maintenance:** Typically 1-3 liters over 24 hours, depending on fluid balance, renal function, and clinical status. Daily maintenance fluid requirements are generally 25-35 mL/kg/day. * **Diluent:** Use as recommended by specific drug product labeling. ## Pediatric Dosing * **Resuscitation:** 20 mL/kg IV bolus, may repeat up to 3 times. Subsequent doses depend on clinical response. * **Maintenance:** Generally 100 mL/kg/day for the first 10 kg, 50 mL/kg/day for the next 10 kg, and 20 mL/kg/day for remaining weight. Actual maintenance fluid therapy depends on patient factors. * **Diluent:** Use as recommended by specific drug product labeling. ## Dose Adjustments * **Renal Impairment:** Use with caution due to risk of fluid overload and electrolyte imbalance. Rate of administration should be slowed. * **Heart Failure:** Use with caution due to risk of fluid overload. Rate of administration should be slowed. * **Hepatic Impairment:** No specific dose adjustment, but monitor for fluid overload. ## Contraindications * Known hypersensitivity to sodium chloride. * Conditions where fluid overload is detrimental (e.g., severe heart failure, severe renal impairment). ## Adverse Effects * **Fluid Overload:** Edema, pulmonary congestion, hypertension, electrolyte imbalances (hypernatremia, hyperchloremia). * **Local:** Phlebitis at the injection site. ## Key Drug Interactions None. Normal saline is an IV fluid and diluent. However, the rate of infusion can affect the pharmacokinetics of concurrently administered IV medications. ## Monitoring * Vital signs (blood pressure, heart rate, respiratory rate). * Urine output. * Fluid balance (intake and output). * Electrolytes (sodium, chloride), especially with prolonged or high-dose administration. * Signs of fluid overload (e.g., peripheral edema, crackles in lungs). ## Clinical Pearls * Normal saline is generally considered compatible with most IV medications for dilution. * Rapid infusion can lead to hyperchloremic metabolic acidosis. * Use cautiously in patients with pre-existing hypernatremia, as it can worsen the condition if not carefully managed. * Infusion rates are highly individualized based on patient condition, clinical goals, and response. Local protocols often guide resuscitation and maintenance fluid rates. *** **Disclaimer:** This information is intended for clinical professionals. Always consult the current prescribing information and relevant clinical guidelines for complete and up-to-date details.