Anyone encountered this before? I started Clen about 3 days ago and I all of a sudden started getting really itchy on my back, no rash or anything though. I've been ramping my doses and haven't got up to 100mcg's yet but thinking I my stay at a lower dose 75mcg's until I can figure out why this is going on. Nothing else has changed by the way since I started my clen. Any feedback? Is it just me?