Ugh, same thing happened to me the first time I dropped (not including the hip hop house party, FYI that isn't a rave, not by a long shot). What's worse was it was from a friend that I knew took extra care in getting legit pills, but for whatever reason the first one I got was bunk
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freund, hold off buying until you actually get to a rave. Meet some people and find a legit dealer. My 2 cents