two types of controlled-release formulations of propoxyphene hydrochloride , one with a buffer system in the pellet core , were studied with regard to intra- and intersubject variations of cmax and tmax of propoxyphene as well as propoxyphene plus norpropoxyphene in 35 volunteers after administration of a single 150-mg dose .
C0242451
propoxyphene hydrochloride
C0033493
propoxyphene