Yes, the irony is delicious, isn't it? I knew someone who was addicted to methadone for 15 years. They still have methadone, but I'm not sure they have the places where the junkies all turn up and stand in line. Think they've gotten more subtle with it.
Very sad, indeed. The government's ills at trying to cure the 1960s and 70s. A childhood friend of mine got into heroin; told me years later that if she'd known how addictive methadone was, she'd just have suffered the withdrawal of heroin.
Sadly, I doubt she's alive today. She'd be 51.