Within the US, pure dihydrocodeine is often a DEA Schedule II material, Even though preparations containing little amounts of dihydrocodeine can be categorised as Routine III or Routine V, with regards to the focus of dihydrocodeine relative to other active constituents, including paracetamol (acetaminophen). Dihydromorphine is widely used in Japan. https://jackl864fnt5.wikigdia.com/user