While I haven't dabbled in charlie myself, I know a lot of people who have and still do, when suspecting an 'illegal substance abuse' with a conscious casualty, I always do the same thing - sit down next and give them the old "Go on, you've had a little (insert suspected drug here), haven't you? It's ok, I'm not a copper, I can't do anything to you if you have, but the more Iknow, the more I can help." I'm always friendly and understanding (something I've found some of my collegues don't have the patience for) - it's their body, and I would be a hypocrit (not to mention, a liar) to get them in trouble for it (unless they were violent of course). And while i dont dance with the monkey myself, I do drink (sometimes quite a bit), both alcohol, caffeine and sugary fizzy drinks - all of these things have affects to behavioural and metabolic systems, and can adversely affect health when moderation goes out the window. I would not acknowledge the baggy. My hand would close over it and I'd check her vitals before saying she should see her GP if symptoms persist, and then I'd leave. If she asks for it back, I'd get police involved, but otherwise deliver it back to the police at the end of the shift, explaining that it was from an anonymous casualty, or cite the patient confidentiality - either way, they can take the drugs. If the girls try to take back the baggy, that would be assault (it usually is when cocaine is involved) and then the police should rightly be involved. More than likely, if they notice you holding the drugs, they'll either run for it, try to explain it away, or do the old "How did that get there?" Either that, or (and this is more likely) I would "Accidentally" drop it down a storm drain in front of them. They can't hurt themselves, you have no evidence to give police (thus breaking patient conf), and they don't go to prison for an extremely long time. Everybody wins. Plus, they're less likely to do stupid 999 calls again.