Lyric discussion by chinook 

Cover art for Opium lyrics by Marcy Playground

Kurt Cobain was not addicted to opium, he was addicted to heroin. They are two different substances. Also, the song is not about Cobain's addiction. It is about opium.

@chinook Well, if you wanna get tech nical about it-- heroin is diacetyl-morphine, which is converted in vivo to morphine.

Opium is the raw paste from the opium poppy, this paste contains morphine, among other alkaloids (codeine, thebaine, are 2 other major ones in the mix).

So... technically they're the same drug by the time it makes it to your brain.