Natriumhydrogencarbonat-Lösung (Sodium Hydrogen Carbonate)

Sodium hydrogen carbonate solution acts on systemic acid‑base balance and is indicated for the following conditions:

• Metabolic acidosis: restores normal plasma pH by providing bicarbonate ions.
• Acid‑base disturbances: buffers excess hydrogen ions to correct pH abnormalities.
• Hyperkalemia (adjunct therapy): promotes intracellular shift of potassium while correcting acidosis.

• After intravenous administration, sodium hydrogen carbonate dissociates into sodium and bicarbonate ions. The bicarbonate ions combine with excess hydrogen ions to form carbonic acid, which is rapidly converted to water and carbon dioxide for exhalation, thereby raising plasma pH and correcting metabolic acidosis.

Sodium hydrogen carbonate injection may be associated with several adverse reactions.

Common Side Effects

• Hypernatremia: elevated serum sodium levels.
• Fluid overload: excess extracellular fluid volume.
• Metabolic alkalosis: over‑correction of pH.
• Hypocalcemia: reduced ionized calcium.
• Hypokalemia: lowered serum potassium.
• Local irritation at IV site: redness or discomfort.

Serious or Rare Side Effects

• Severe metabolic alkalosis: can lead to seizures or cardiac arrhythmias.
• Pulmonary edema: accumulation of fluid in the lungs.
• Cardiac arrhythmias: due to electrolyte shifts.
• Severe hypernatremia: neurologic impairment.
• Hypersensitivity reactions: rash, urticaria, or anaphylaxis.
• Thrombophlebitis: inflammation of veins at the infusion site.

When using sodium hydrogen carbonate solution, clinicians should observe the following precautions:

• Monitor serum electrolytes: regularly check sodium, potassium, calcium, and bicarbonate levels.
• Adjust infusion rate: avoid rapid administration that may cause over‑correction.
• Assess acid‑base status: perform frequent blood‑gas analyses.
• Use caution in renal impairment: reduced bicarbonate excretion may increase risk of alkalosis.
• Contraindicated in severe metabolic alkalosis: do not administer.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Sodium hydrogen carbonate may interact with other medications that affect acid‑base balance or electrolyte homeostasis.

Major Interactions (Avoid)

• Oral sodium bicarbonate: additive alkalinizing effect.
• Carbonic anhydrase inhibitors (e.g., acetazolamide): risk of severe alkalosis.
• High‑dose potassium supplements: may blunt intended potassium shift.

Moderate Interactions (Monitor Closely)

• Loop diuretics (e.g., furosemide): can exacerbate electrolyte disturbances.
• ACE inhibitors or ARBs: monitor potassium and acid‑base status.
• NSAIDs: may affect renal handling of bicarbonate and electrolytes.