A 65-year-old man on ICU has been sedated with IV dexmedetomidine for 5 days. The team notes he has been more cooperative and interactive during sedat...

Question

A 65-year-old man on ICU has been sedated with IV dexmedetomidine for 5 days. The team notes he has been more cooperative and interactive during sedation compared to propofol, with reduced delirium episodes. What is the mechanism by which dexmedetomidine may reduce delirium compared to GABAergic sedatives?

Accepted Answer

Dexmedetomidine produces sedation via alpha-2 agonism in the locus coeruleus, mimicking natural sleep architecture (preserving REM and non-REM sleep), unlike GABAergic agents (propofol, benzodiazepines) which suppress normal sleep patterns

Answer

Dexmedetomidine has no effect on delirium

Answer

Dexmedetomidine causes deeper sedation, preventing awareness of delirium triggers

Answer

Dexmedetomidine has direct antipsychotic properties

Answer

Dexmedetomidine prevents all ICU complications

uk-fficm MCQ (SBA): Dexmedetomidine and Delirium