I had a thought about these long term comedowns that seem to be more and more common on BL. It seems a lot of posts I read from people going through these experiences are from people living in England. Could it be possible that some MDxx substitute being sold as mdma is more prevalent in the uk than in the US? I only say this because first, as I mentioned, I read a lot of experiences from long term comedown sufferers residing in England, and second, I myself was studying abroad in the UK when all of my negative dp/dr symptoms arose from one night on "mdma". I never had adverse reactions to pills purchased in California where I'm from. Obviously there are innumerable variables and unknowns. This is pretty much complete conjecture. I'd still be interested to hear others thoughts.