i consider myself to be alongst the more strict drug users, never had a problem with any drug until opiates..i started out snorting heroin 1-2 a wek, basically like everyone does and it escalated into a nightmare..i have talked to plenty of users and dealers, former addicts and NONE of them know anyone that has used heroin "occasionally" for over a span of 6 months to a year without developing a problem with it..of course, on the internet u will read how certain people claim they have done it for years on end without getting hooked but i dont believe them...the only way i can see someone using it just occcasionally is if they have a blanket, which is methadone maintenance or subuxone..i just do not think it is possible to use a drug like heroin "just for fun on friday nights" for years on end without developing an addiction ..