My flatmate had a rather horrific experience last night. He has been hoovering up the ket in recent weeks (more like months now), at least 2g a night and often much more.
Apparently what happened was he woke up after a massive ket bender in his bed with his bedsheets covered in blood that he has thrown up with no recollection. He also had valium and a lot of weed that night so it's probably not just ketamine's fault. He's been suffering a lot of pain from the ketamine use, but not to the extent that he's been on the floor in agony (however, it is possible that from his use he's got rid of the majority of the pain by constant ketamine use). He has also had problems pissing lately which all points to the ket.
He's going to the doctor tomorrow about it. I'm extremely worried about it, if he has been throwing up in that sort of state alone he is so lucky to be alive. He's an extremely intelligent guy but has a massive problem with drugs - he just can't stop himself doing them. His knowledge about drugs also poses a problem, while he knows a lot of pharmacology for some reason when he should most listen to it he totally ignores it.
Anyway, serious warning here guys. Ketamine's took over my mate like nothing else, and he's done an awful lot of drugs in his past, especially, a massive cocaine abuse spree which he managed to get over but the k likes him too much to let go.