long term heroin abuse

In the US, heroin was originally used in pain relief, along with morphine which is, like heroin, also derived from the opium poppy. However, heroin became illegal in 1924 when its highly addictive qualities were realized. Morphine, much less potent, is still in use today for medical purposes. Heroin and other opiates, like all recreational psychoactive drugs, operate within the brain to create a euphoric high for those who use…