Robert Moore stopped smoking synthetic cannabis a year ago, but is still recovering from its effects and does not know when he will be "right" again.
The 24-year-old told the Herald last year that after four months of smoking Kronic, his life began to "fall apart".
He developed a daily habit, spending about $80 a day on Kronic, and hit "rock bottom".
Now living in Australia, Mr Moore said yesterday he was only just starting to feel almost back to normal.
"But I think it still has an effect. I can't drink any more because I get quite violent. That stuff definitely twists you up for a while," he said.