The heroin abstinence, like alcohol abstinence, is something painful and hard to pass through. Listen a history when Kurt Cobain and Courtney Love came in Brasil, in 1993, when they go down in street searching for heroin, but in Brazil there's no heroin. So, come to my mind, many rockstars are addict to heroin, and sure enough, a lot of time they find themselves without this in countries like Brazil (a cocaine paradise where heroin just does not exist). So, what probably those heroin addicts take when there's no heroin available? Which available (and accessible without medical prescription) substances would avoid the problems of heroin abstinence.