<prompt> Heroin is?CocaineOpioidDhaturaCannabis  <response>: Heroin is diacetyl morphine semisynthetic form of opium Classification of opiods: 1 Natural: morphine, codeine.2 Semi-synthetic: heroin, hydromorphone, oxymorphone, oxycodone. 3 Synthetic: meperidine, methadone, paregoric, diphenoxylate, fentanyl, propoxyphene,levarphanol tarate. 