I don't want to work with anyone who is a drug user - regardles of legal or not. Narcotics affect people's judgement and reasoning, so in any environment where safety is a primary concern, such as construction, you really don't want your safety, or that of others around you, to depend on some clown who is hopped-up on drugs. I've got rid of two of them for blatant drug use whilst at work in recent years, where their behaviour was erratic and the quality of their work was poor. Believe me, you don't want a drugged-up idiot working on a roof 100 feet up next to a road or putting in floor joists in from the top of a 2-storey high scaffolding tower. What is more worrying is that drug use at work now seems to be more common than alcohol - possibly cheaper, or less likely to be smelled, who knows? So, not really a fan of legalsation, I'm afraid.
Currently on opiod pain killers and I have to say that whilst it takes away the pain, I find that concentrating on anything for more than about 10 or 15 minutes is almost impossible. I'm starting to reduce the quantities slowly and TBH I'll be glad when I can cut them out