I was an ec junkie, I loved the stuff. I never realy stopped to long. Maybe a week off then back on untill I stopped feelin it. But ever when over 25mg if it. I thought id try clen and that it be good to clear my ephedrine receptors. Clen was great did 3 weeks and wanted to run longer but the effects died off after 3 week at 120mcg. I could up the dose but decided to go back to ec to let then clen receptors clear. I tryed ec and felt nothing at all. Today I did 50mg of ephedrine with 200mg of caffeine and nothin still. Before clen I could feel the ec stack but now I feel nothing. Any help on why?