Thanks for the link. I've read the first few pages: it's a really good read! Will definitely be reading this on the weekend.

On the paradoxical reaction to benadryl, and this is completely amateur speculation on my part, I wonder if it's because of benadryls anticholinergic effects (combined with a greater sensitivity, lower threshold etc.) resulting in a pseudo-anticholineric toxicity? And thereby outweighing the more typical effects of H1 anti-histamines? (disclaimer: I am very not a doctor, and this stuff is mostly beyond me)