Lactated Ringer’s Injection (Sodium Lactate Solution, Potassium Chloride, Sodium Chloride, Calcium Chloride Dihydrate)

Sodium lactate provides lactate ions that the liver metabolizes into bicarbonate, contributing to pH buffering. Together with sodium, potassium, calcium, and chloride, it expands the extracellular fluid compartment and supplies essential electrolytes needed for cellular function and hemodynamic stability.

The dose of Lactated Ringer’s Injection is individualized by the prescribing clinician based on the patient’s weight, fluid losses, and clinical condition. The prescriber determines the volume and rate of infusion required for each specific situation.

Safety data for Lactated Ringer’s Injection in pregnancy and lactation are limited. It is generally used only when clearly needed and when the potential benefits outweigh any theoretical risks. Clinicians should evaluate each case carefully.

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Unlike normal saline, Lactated Ringer’s contains potassium, calcium, and lactate, providing a more physiologic electrolyte composition and a buffering effect that can help correct metabolic acidosis. Normal saline lacks these ions and may cause hyperchloremic acidosis when used in large volumes.

Lactated Ringer’s Injection should be stored refrigerated at 2‑8 °C, protected from light, and never frozen or shaken. Before use, inspect the container for particulate matter or discoloration and allow the solution to reach room temperature if rapid infusion is required.

The solution is administered intravenously, either as a rapid bolus for acute resuscitation or as a controlled infusion for ongoing fluid replacement. Administration sets should be compatible with the solution, and infusion rates are adjusted according to the patient’s hemodynamic response.

Serious risks include severe electrolyte disturbances such as hyperkalemia or hypercalcemia, fluid overload leading to pulmonary edema, and rare anaphylactoid reactions. Continuous monitoring of vital signs, fluid balance, and serum electrolytes helps mitigate these risks.

Patients with known severe hyperkalemia, hypercalcemia, or severe liver dysfunction that impairs lactate metabolism should avoid Lactated Ringer’s Injection. Clinicians should also exercise caution in individuals with congestive heart failure or renal failure where fluid overload is a concern.