containing morphine, significant amounts of hydromorphone form, as it is an intermediary metabolite in this process; the same goes for codeine being turned into hydrocodone.[52]The process gave rise to various concentrations of hydromorphone, dihydromorphine, hydromorphinol, and oxymorphone during the experiments. Three paths were found: from morphine to hydromorphone with dihydromorphine as the penultimate step, from morphine to hydromorphone with morphinone as the penultimate step, and from morphine to hydromorphinol to hydromorphone.History[edit]Hydromorphone was patented in 1923.[8] It was introduced to the mass market in 1926 under the brand name Dilaudid,[53] indicating its derivation and degree of similarity to morphine (by way of laudanum).Society and culture[edit]Names[edit]Hydromorphone