Hi, my son is 14 - year 10. He came home yesterday after going out with his friends. He did not look "right" was a little absent, forgetting what he was saying. I asked him where he had been and he said he'd been for a walk with his friends (teens don't walk, they get lifts). He went upstairs and fell asleep. When I woke him his eyes were like pinholes. I asked him what he had taken. He started saying he hadn't done anything. But I KNEW he had. Well this morning I found a nitrous oxide canister. Frankly this terrified me. He has a new friend at school who was excluded from his last school and I am pretty sure he got it from him. I am not blaming the other kid as my DS has his own mind. But how do I deal with this? I'd like to warn the school and I would also like to tackle this with my son. Any advice would be gratefully received. Thank you