triclofos triclofos triclofos is a sedative drug used rarely for treating insomnia. triclofosclinical dataahfs/drugs.cominternational drug namesatc coden05cm07 (who) identifiers iupac name 2,2,2-trichloroethanol dihydrogen phosphate cas number306-52-5 n 8060-81-9pubchem cid5563chemspider5362 yuniij712eo9048chemblchembl1201317 ncomptox dashboard (epa)dtxsid9023700 echa infocard100.005.624 chemical and physical dataformulac2h4cl3o4pmolar mass229.37 g·mol−13d model (jsmol)interactive image smiles clc(cl)(cl)cop(=o)(o)o inchi inchi=1s/c2h4cl3o4p/c3-2(4,5)1-9-10(6,7)8/h1h2,(h2,6,7,8) ykey:yyqrgczgsfrbam-uhfffaoysa-n y ny (what is this?) (verify) triclofos is a prodrug which is metabolised in the liver into the active drug trichloroethanol. the half-life of triclofos is fairly long and it may cause drowsiness the next day. trichloroethanol may cause liver damage and triclofos should not be used for extended periods. triclofos is no longer available in the united states. side effects side effects may include: headache, rash, dizziness, flatulence, confusion, nightmares, dependence, diarrhoea, constipation, nausea, vomiting, abdominal pain, and ataxia.