Pharmacological Action & Use: Dexmedetomidine (Precedex) is a selective, centrally-acting alpha-2 adrenergic receptor agonist. Presynaptic activation inhibits norepinephrine release and pain signals; postsynaptic CNS activation inhibits sympathetic activity, decreasing heart rate and blood pressure. This produces arousable sedation, anxiolysis, and mild analgesia without significant effects on respiratory drive. It is indicated for ICU ventilator sedation, procedural sedation, and acute psychiatric agitation (sublingual film).

Why Choose It: Unlike benzodiazepines or propofol, it sedates without causing respiratory depression, making it ideal for weaning mechanically ventilated patients. It is 8 times more selective for alpha-2 receptors than clonidine. ...