lorpiprazole lorpiprazole lorpiprazole (inn) (brand name normarex) is a marketed anxiolytic drug of the phenylpiperazine group. it has been described as a serotonin antagonist and reuptake inhibitor (sari) in the same group as trazodone, nefazodone, and etoperidone. lorpiprazoleclinical dataroutes ofadministrationoralatc codenonelegal statuslegal status in general: uncontrolled identifiers iupac name (5ar,8as)-3-(2-ethyl)-5,5a,6,7,8,8a-hexahydrocyclopentapyrrolotriazole cas number108785-69-9pubchem cid3045380chemspider16736802unii0m14o7t47qcomptox dashboard (epa)dtxsid30883181 chemical and physical dataformulac21h26f3n5molar mass405.469 g·mol−13d model (jsmol)interactive image smiles fc(f)(f)c1cc(ccc1)n5ccn(ccc4nnc2n4c3ccc23)cc5