My wife had to quit her job as a psychiatric nurse because of the violence from drug addicts. She was punched in the face five times by someone who wanted his methadone.
Go figure where we'll be if it gets legalized.
I'm in the UK as well. The last thing we need is more health expenditure on this.
Edit: 1 downvote from the pro-drugs crowd.
Edit: seeing as HN has restricted by posting rate...
He wasn't in the hospital because he needed methadone. He was in the hospital because his drug problem had lead to him passing out in the street, flies had laid eggs in his legs and maggots were crawling out of them and he was going to die from infection. My wife was trying to help him. The only reason that he wanted methadone is because they won't give him the real stuff in the hospital, which he could get his hands on without any trouble outside the doors so availability is not a problem.
Another edit: work in a psych ward. 95% of people in there are violent addicts of various substances. This is not a coincidence.