proheptazine proheptazine proheptazine is an opioid analgesic from the phenazepine family. it was invented in the 1960s. proheptazineclinical dataatc codenonelegal statuslegal status au: s9 (prohibited substance) ca: schedule i de: anlage i (authorized scientific use only) us: schedule i identifiers iupac name 1,3-dimethyl-4-phenylazepan-4-yl propionate cas number77-14-5pubchem cid60969chemspider54931 yuniis23189ww7eecha infocard100.000.916 chemical and physical dataformulac17h25no2molar mass275.392 g·mol−13d model (jsmol)interactive image smiles o=c(oc2(c1ccccc1)cccn(c)cc2c)cc inchi inchi=1s/c17h25no2/c1-4-16(19)20-17(15-9-6-5-7-10-15)11-8-12-18(3)13-14(17)2/h5-7,9-10,14h,4,8,11-13h2,1-3h3 ykey:zxwauwbyasjeoe-uhfffaoysa-n y (verify) proheptazine produces similar effects to other opioids, including analgesia, sedation, euphoria, dizziness and nausea. in the united states it is a schedule i narcotic controlled substance with an acscn of 9643 and a 2013 annual aggregate manufacturing quota of zero. the salts in use are the citrate (free base conversion ratio 0.589), hydrobromide (0.773), and hydrochloride (0.883).