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Dexmedetomidine

Up Benzodiazepines Dexmedetomidine Ketamine Propofol

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Claudia Cheng

Class

  • Alpha 2 adrenergic agonist
  • Sedative with some analgesic properties

Clinical uses

  • Licensed for sedation in initially intubated and mechanically ventilated adult patients during treatment in an intensive care setting for up to 24 hours only
  • Significantly reduces postoperative concurrent analgesic and sedative requirements
  • Patients sedated with dexmedetomidine appear to be asleep while being readily arousable and interactive when stimulated without respiratory depression
  • Most clinical experiences with Dex are in postoperative patients
  • Role of dexmedetomidine  in medical ICU patients  and for longer term use (>24 h) need to be further defined

Adverse reactions

  • Cardiovascular
    • Bolus dosing to be avoided as associated with transient hypertension, hypotension and bradycardia, sinus arrest in presence of hypovolemia or high sympathetic tone
  • Gastrointestinal
    • Nausea, vomiting
  • Central nervous system
    • Pain, fever
  • Hematologic
    • Anaemia and leukocytosis
  • Renal
    • Oliguria

Monitoring parameters

  • Blood pressure and heart rate

Dosing

  • Dosing for ICU sedation: initial loading infusion of 1 µg/kg over 10 minutes, followed by a maintenance infusion of 0.2 – 0.7 µg/kg/hour (individualized and titrated to clinical effect)
  • Dexmedetomidine 200 µg/2 ml injection

© Claudia Cheng, December 2003


©Charles Gomersall, October, 2009 unless otherwise stated. The author, editor and The Chinese University of Hong Kong take no responsibility for any adverse event resulting from the use of this webpage.
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