Wiktionary
atipamezole
n. A synthetic alpha2-adrenergic antagonist indicated for the reversal of the sedative and analgesic effects of dexmedetomidine and medetomidine in dogs.
Wikipedia
Atipamezole
Atipamezole (brand name Antisedan, Pfizer) is a synthetic α adrenergic receptor antagonist, indicated for the reversal of the sedative and analgesic effects of dexmedetomidine and medetomidine in dogs.
It has also been researched in humans as a potential anti-Parkinsonian drug.