Natriumhydrogencarbonat B. Braun (Sodium Hydrogen Carbonate)

Natriumhydrogencarbonat B. Braun is used to correct acid‑base imbalances, primarily metabolic acidosis, by supplying bicarbonate ions.

• Metabolic acidosis: restores systemic pH by providing bicarbonate ions, helping to normalize blood acidity.
• Acid‑base disturbances: corrects systemic acidemia in various clinical settings, such as renal failure or severe diarrhea.
• Urine alkalinization: raises urinary pH to facilitate excretion of certain toxins or improve solubility of drugs.
• Adjunct in drug administration: used to prevent precipitation of acidic drugs or to enhance the efficacy of specific antimicrobial therapies.

• Sodium hydrogen carbonate dissociates in plasma to release bicarbonate ions, which combine with hydrogen ions to form carbonic acid. Carbonic acid is rapidly converted to water and carbon dioxide, which is eliminated via respiration. This buffering reaction raises blood pH, counteracting metabolic acidosis and supporting acid‑base homeostasis. The intravenous route ensures rapid and efficient distribution of bicarbonate throughout the extracellular fluid compartment.

Intravenous administration of sodium hydrogen carbonate may be associated with several adverse reactions, ranging from mild to severe.

Common Side Effects

• Hypernatremia: elevated serum sodium levels due to sodium load.
• Metabolic alkalosis: excessive rise in blood pH if over‑corrected.
• Fluid overload: increased intravascular volume leading to edema.
• Local irritation: pain or phlebitis at the infusion site.
• Transient CO₂ increase: temporary rise in arterial CO₂ during metabolism.

Serious or Rare Side Effects

• Severe metabolic alkalosis: can cause respiratory depression and neuromuscular irritability.
• Pulmonary edema: fluid accumulation in lungs from rapid volume expansion.
• Cardiac arrhythmias: electrolyte shifts may precipitate abnormal heart rhythms.
• Anaphylactic reaction: rare hypersensitivity with hypotension and bronchospasm.

Before using Natriumhydrogencarbonat B. Braun, clinicians should consider several safety precautions to minimize risks.

• Renal impairment: monitor serum electrolytes and acid‑base status closely.
• Cardiac disease: watch for fluid overload and electrolyte‑induced arrhythmias.
• Pregnancy: use only when potential benefit justifies potential risk to the fetus.
• Concomitant alkalizing agents: avoid additive alkalosis by adjusting doses.
• Administration technique: ensure correct dilution and controlled infusion rate to prevent rapid pH shifts.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Sodium hydrogen carbonate can interact with other medicines, affecting their absorption, distribution, or pharmacodynamic effects.

Major Interactions (Avoid)

• Other alkalinizing agents (e.g., oral bicarbonate, citrate): risk of severe metabolic alkalosis.
• Calcium channel blockers: may enhance hypotensive effect due to increased extracellular calcium.
• Potassium‑wasting diuretics: can exacerbate hypokalemia when combined with bicarbonate therapy.

Moderate Interactions (Monitor Closely)

• Certain antibiotics (e.g., tetracyclines, fluoroquinolones): bicarbonate may reduce their absorption.
• Aspirin and other weak acids: increased ionization may diminish analgesic effect.
• Anticonvulsants (e.g., phenobarbital): altered protein binding may modify drug levels.