Synonyms: Hydrocodone bitartrate syrup;Hydrocodone bitartrate hydrate;Dihydrocodeinone bitartrate hydrate;Hydrocodone bitartrate hemipentahydrate;Dihydrocodeinone bitartrate 2.5 hydrate;Morphinan-6-one, 4,5-epoxy-3-methoxy-17-methyl-, (5alpha)-, (2R,3R))-2,3-dihydroxybutanedioate (1:1), hydrate (2:5);Morphinan-6-one, 4,5-epoxy-3-methoxy-17-methyl-, (5alpha)-, (R-(R*,R*))-2,3-dihydroxybutanedioate (1:1), hydrate (2:5);Anodynos-DHC;UNII-NO70W886KK;Hydrocodone bitartrate [USAN];125-29-1 (Parent);C18H21NO3.C4H6O6.2H2O;LS-174454;Hydrocodone Tartrate (1:1), Hydrate (2:5);4,5alpha-Epoxy-3-methoxy-17-methylmorphinan-6-one tartrate (1:1) hydrate (2:5);8017-14-9