• Type: sugar alcohol, derived from mannose, stereo-isomer of sorbitol
  • Dosage Forms: Reconstituted powder and solution[1]
    • 5% and 10% in 1000ml containers
    • 15% in 500ml containers
    • 20% in 250ml and 500ml containers
    • 25% in 50ml flip-top vials
  • Common Trade Names: Mannitol, Osmitrol


Elevated intracranial pressure

  • 0.25-2 g/kg given every 6 to 8 hours[2]
    • Should be given as a one time bolus (may be inferior to Hypertonic Saline)[3]
    • Easy ED dosing: 1g/kg bolus in ED (while awaiting neurosurgery eval/admission)

Cerebral edema

  • 0.25-1 g/kg IV initially; maintenance dose of 0.25-0.5 g/kg IV q4-6hr[4]

Special Populations

  • Pregnancy Rating: C
  • Lactation:
    • Unknown if present in breast milk
  • Renal Dosing
    • Adult
      • Contraindicated in severe renal impairment
    • Pediatric
      • Contraindicated in severe renal impairment
  • Hepatic Dosing
    • Adult
      • No adjustment necessary
    • Pediatric
      • No adjustment necessary


  • Lowering ICP with signs of impending herniation or severely deteriorating mental status in context of known trauma or intracranial lesion exerting mass effect


  • Allergy to class/drug

Adverse Reactions


  • Half-life:
  • Metabolism:
  • Excretion:
  • Mechanism of Action:

See Also


  • Mannitol (systemic): Drug information. UpToDate. Accessed April 2, 2019.
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