heroin is basically just morphine, it can be used to manage pain ;P
cocaine can be used as a local anaesthetic
ketamine is used to tranquilise animals
etc. ;)
Technically it's "morphine is bascially just heroine" as morphine is asynthetic drug based on the chemical structure of Heroine. It's quite a complex structre as well with a briding chain stretching across the molecule.
Synthetic cocaine substitutes are prescribed for pain relief (codeine, cocodamol, codydramol).


