Yep that'd be the ammonia, and yes, it happens to pretty much everyone killing parasites - google hepatic encephalopathy for more information.. btw - if you're in the USA you can't get lactulose without prescription but you can get the amino acids l-arginine and l-ornithine. I'm guessing you have stopped drinking alcohol? Also avoid eggs.. Taking something to help your liver - eg milk thistle - will also help your body to get rid of the toxins. Epsom Salt baths also handy. Keep your head up - you will beat them eventually, and try to remind yourself how good things will be when you get rid of em all. Its likely if you're really reacting badly to the detox then you may have a relatively serious infection, which is obviously bad in one sense but also means you will be that much more improved when its all over..