Mechanism of Action
Dexmedetomidine hydrochloride in 0.9% sodium chloride injection is a relatively selective alpha2-adrenergic agonist with sedative properties. Alpha2 selectivity is observed in animals following slow intravenous infusion of low and medium doses (10 to 300 mcg/kg). Both alpha1 and alpha2 activity is observed following slow intravenous infusion of high doses (≥1,000 mcg/kg) or with rapid intravenous administration.

Dexmedetomidine Hydrochloride is the hydrochloride salt form of dexmedetomidine, an imidazole derivate and active d-isomer of medetomidine with analgesic, anxiolytic and sedative activities. Dexmedetomidine selectively binds to and activates presynaptic alpha-2 adrenoceptors located in the brain, thereby inhibiting the release of norepinephrine from synaptic vesicles. This leads to an inhibition of postsynaptic activation of adrenoceptors, which inhibits sympathetic activity, thereby leading to analgesia, sedation and anxiolysis.

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