Opium comes from the opium poppy flower's dried latex. It likely originated in Southern Europe. The current leading producer of Opium is Afghanastan, and the US is the biggest user of prescription opioids.
There is speculation that Prince overdosed on Opium a couple weeks back, just a day before he was due to get treatment for his addiction. His death brings into question the freedoms that we should give to those who we know have addictions. If Prince had been hospitalized when people like his family found out about his drug abuse, he may still be alive.