barbexaclone barbexaclone barbexaclone (maliasin) is a salt compound of phenobarbital and levopropylhexedrine. it was introduced in 1983. it has been reported to be as effective as phenobarbital but better tolerated; however, as of 2004, these "promising results" had not yet been confirmed nor denied in controlled trials. barbexaclonecombination ofphenobarbitalbarbituratelevopropylhexedrinestimulant (sympathomimetic)clinical dataahfs/drugs.cominternational drug namesatc coden03aa04 (who) identifierscas number4388-82-3 ypubchem cid71196drugbankdb09001 nchemspider64332 yunii291gx1yb65comptox dashboard (epa)dtxsid90195974 echa infocard100.022.278 ny (what is this?) (verify) potency 100 mg of barbexaclone is equivalent to 60 mg of phenobarbital.