If I want to kill myself with substances let me do it, just arrest me when I cause anyone else harm.
Bloody do-gooders, so concerned with what I'm doing.
You live in a country with socialized medicine right? If you want to kill yourself by stepping off of a tall building, and can be sure that no one else is below you, then you can do it and it does't really cost anyone else anything.
If, however, you choose a slow death from substance abuse, every bit of medical care you get is coming out of the pocket of someone who is paying taxes and since they are paying for your care, they have every right to restrict you from substances that are, in the end, going to cost them money.
The same is becoming true here in the US. Most abusers don't have their own insurance, and can't afford their own care, so the rest of us end up paying for it. Like I told my kids, they can do whatever they like when they are grown up enough to pay their own way but as long as I am footing the bills, I get to make the rules. In a socialist system, however, you never get to be grown up enough to assume complete responsibility for either yourself or your actions.
That is one of the problems with living in a socialist society. You don't have the freedom to do what you like and pay for your mistakes yourself. Everything you do has an effect on everyone else. Even if yours is the only body being hurt by substance abuse, someone else is being hurt monitarily.