A highly selective α₂-adrenergic agonist used for sedation and analgesia.
Dexmedetomidine produces dose-dependent, cooperative sedation by inhibiting norepinephrine release in the locus coeruleus, resulting in a sleep-like state with minimal respiratory depression. It also provides sympatholysis and mild analgesia, making it opioid-sparing. Unlike GABAergic sedatives, patients remain easily arousable and interactive.
It is administered as an IV infusion, metabolized hepatically, and most commonly used for ICU and procedural sedation. Key adverse effects are bradycardia and hypotension, particularly with loading doses or rapid titration.
Synonyms
Precedex, Dexdor