Rezatomidine (AGN-203818) is an effective and selective alpha2-adrenergic receptor antagonist for the treatment of chronic pain, including neuropathic pain.

(2R,3S,11bS)-9,10-dimethoxy-3-(2-methylpropyl)-1H,2H,3H,4H,6H,7H,11bH-pyrido[2,1-a]isoquinolin-2-ol is an impurity of Tetrabenazine, which is a VMAT inhibitor used in the treatment of hyperkinetic movement disorder.

(Gly1,Ser3·22,Gln4·34,Thr6,Arg19,Tyr21, Ala23·31,Aib32)-Pancreatic Polypeptide (human)