So, just recently got back from ibiza. Now i research my drugs indepth and understamd how they work etc. The lads i went with dont. And one the penultimate night he actually had to take 7 pills to feel anything, of which i took 1.5 and was so messed up i couldnt find my way to the toilets at one point. He probz did 15+ over the 5 days. Surely this cant be good so my question is what damage could this of done? Anything permanant. And is this a case of tolerance developing or is it just lack of brain chemicals left? Thanks.