pimethixene pimethixene pimethixene is an antihistamine and anticholinergic of the thioxanthene chemical class originally developed to treat hyperactivity, anxiety, sleep disorders, and allergy. it is also used for anesthesia and as a bronchodilator (to dilate the bronchi and bronchioles for more airflow). pimethixeneclinical dataahfs/drugs.cominternational drug namesroutes ofadministrationoral, nasalatc coder06ax23 (who) identifiers iupac name 1-methyl-4-(9h-thioxanthen-9-ylidene)piperidine cas number314-03-4 npubchem cid4822chemspider4656 yuniit46j20j26fkeggd07406 ychemblchembl152408 ycomptox dashboard (epa)dtxsid0048476 echa infocard100.005.675 chemical and physical dataformulac19h19nsmolar mass293.43 g·mol−13d model (jsmol)interactive image smiles s2c1ccccc1/c(c3c2cccc3)=c4/ccn(c)cc4 inchi inchi=1s/c19h19ns/c1-20-12-10-14(11-13-20)19-15-6-2-4-8-17(15)21-18-9-5-3-7-16(18)19/h2-9h,10-13h2,1h3 ykey:nzlvrvynqygmab-uhfffaoysa-n y ny (what is this?) (verify) in combination with pholcodine, it was sold in france by laboratoires salvoxyl in the 1970s as the antitussive salvodex. pimethixene alone is still available in brazil under the trade name muricalm.