Mannitol Fresenius Kabi (Mannitol)

Mannitol is an osmotic diuretic used in several acute medical conditions affecting the brain and kidneys.

• Intracranial hypertension: lowers elevated intracranial pressure.
• Cerebral edema: reduces brain swelling after trauma or surgery.
• Acute renal failure: promotes diuresis to aid fluid removal.
• Toxic renal excretion: facilitates elimination of nephrotoxic substances.
• Intra‑ocular pressure spikes: helps lower pressure after eye surgery.

• Mannitol increases plasma osmolality by remaining largely extracellular, drawing water from intracellular and interstitial spaces into the vascular compartment. This osmotic shift expands intravascular volume, enhances glomerular filtration, and reduces cerebral and intra‑ocular pressure by decreasing tissue water content.

Mannitol may cause several adverse reactions that vary in frequency and severity.

Common Side Effects

• Headache: mild to moderate discomfort.
• Nausea or vomiting: gastrointestinal upset.
• Transient hypotension: brief drop in blood pressure.
• Electrolyte imbalance: especially hyponatremia or hypernatremia.
• Phlebitis at infusion site: local irritation.

Serious or Rare Side Effects

• Severe allergic reaction or anaphylaxis.
• Acute renal failure worsening.
• Pulmonary edema due to fluid overload.
• Severe electrolyte disturbances such as hyperkalemia.
• Hemolysis or intravascular coagulation.
• Cardiac arrhythmias linked to electrolyte shifts.

Before initiating Mannitol therapy, clinicians should evaluate patient‑specific risk factors and monitor relevant parameters.

• Renal function: assess baseline creatinine and urine output.
• Electrolytes: monitor serum sodium, potassium and osmolality regularly.
• Cardiovascular status: watch for hypotension and volume overload.
• Pregnancy: use only when potential benefit justifies potential risk.
• Concomitant nephrotoxic drugs: avoid or closely monitor renal effects.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Mannitol can interact with several medications, requiring caution.

Major Interactions (Avoid)

• Loop diuretics: may cause excessive diuresis and electrolyte loss.
• Insulin: osmotic shifts can potentiate hypoglycemia.
• Lithium: increased risk of lithium toxicity.
• Nephrotoxic agents (e.g., aminoglycosides): may worsen renal impairment.

Moderate Interactions (Monitor Closely)

• ACE inhibitors: may enhance hypotensive effect.
• Beta‑blockers: can mask tachycardia signs.
• Other antihypertensives: monitor blood pressure closely during infusion.