brallobarbital brallobarbital brallobarbital was a barbiturate developed in the 1920s. it has sedative and hypnotic properties, and was used for the treatment of insomnia. brallobarbital was primarily sold as part of a combination product called vesparax, composed of 150 mg secobarbital, 50 mg brallobarbital and 50 mg hydroxyzine. the long half-life of this combination of drugs tended to cause a hangover effect the next day, and vesparax fell into disuse once newer drugs with lesser side effects had been developed. vesparax reportedly was the drug that musician jimi hendrix supposedly overdosed on and led to his untimely death. it is no longer made. brallobarbitalclinical dataother namesbrallobarbitalatc codenoneidentifiers iupac name 3,5 bromo,4 acitamido,2 hydroxy benzoic acid methyl ester cas number561-86-4 ypubchem cid68416chemspider61699 yuniid0n7a2m3muchemblchembl2106093 ncomptox dashboard (epa)dtxsid60204648 echa infocard100.008.387 chemical and physical dataformulac10h11brn2o3molar mass287.113 g·mol−13d model (jsmol)interactive image smiles o=c1nc(=o)nc(=o)c1(cc(\br)=c)c\c=c inchi inchi=1s/c10h11brn2o3/c1-3-4-10(5-6(2)11)7(14)12-9(16)13-8(10)15/h3h,1-2,4-5h2,(h2,12,13,14,15,16) ykey:dyodajaeqdvyfx-uhfffaoysa-n y ny (what is this?) (verify)